100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 570 InterviewSolution

28451.	Which one of the following are correctly arranged on the basis of the property indicated:(a) I2 < Br2 < F2 < Cl2 [increasing bond dissociation enthalpy](b) H2O > H2S < H2Te < H2Se [increasing acidic strength](c) NH3 < N2O < NH2OH < N2O5 [increasing oxidation state](d) BiH3 < SbH3 < AsH3 < PH3 < NH3 [increasing bondangle]
Answer» Answer is (d) BiH₃ < SbH₃ < AsH₃ < PH3 < NH₃ [ increasing bond angle] (a) I₂ < Br₂ > F₂ > CI₂. [ increasing bond dissociation enthalpy]: incorrect order , correct order is Cl₂ > Br₂ > F₂ > I₂. (b) H₂O > H₂S < H₂Te < H₂Se [ increasing acidic strength]: incorrect order , correct order is H₂O < H₂S < H₂Se < H₂Te (c) NH₃ < N₂O < NH₂OH < N₂O5 [ increasing oxidation state ] : incorrect order NH₃ (Oxidation state -3) N₂O (Oxidation state +1) NH₂OH(Oxidation state -1) N₂O₅ (Oxidation state +5) Correct answer is (d) BiH₃<SbH₃<AsH₃<PH₃ <NH₃ [ increasing bond angle due to leaving ammonia other are drago molecules which donot show hybridization and thus from bond angle close to 90°]- correct order.

28451.

Which one of the following are correctly arranged on the basis of the property indicated:(a) I2 < Br2 < F2 < Cl2 [increasing bond dissociation enthalpy](b) H2O > H2S < H2Te < H2Se [increasing acidic strength](c) NH3 < N2O < NH2OH < N2O5 [increasing oxidation state](d) BiH3 < SbH3 < AsH3 < PH3 < NH3 [increasing bondangle]

Answer»

Answer is (d) BiH₃ < SbH₃ < AsH₃ < PH3 < NH₃ [ increasing bond angle]

(a) I₂ < Br₂ > F₂ > CI₂. [ increasing bond dissociation enthalpy]: incorrect order , correct order is Cl₂ > Br₂ > F₂ > I₂.

(b) H₂O > H₂S < H₂Te < H₂Se [ increasing acidic strength]: incorrect order , correct order is

H₂O < H₂S < H₂Se < H₂Te

(c) NH₃ < N₂O < NH₂OH < N₂O5 [ increasing oxidation state ] : incorrect order NH₃

(Oxidation state -3) N₂O (Oxidation state +1) NH₂OH(Oxidation state -1) N₂O₅ (Oxidation state +5)

Correct answer is (d) BiH₃<SbH₃<AsH₃<PH₃ <NH₃ [ increasing bond angle due to leaving ammonia other are

drago molecules which donot show hybridization and thus from bond angle close to 90°]- correct order.

Discussion

28452.	Alkenes decolourise bromine water in presence of CCl4 due to formation of:(a) allyl bromide (b) vinyl bromide (c) bromoform (d) vicinal dibromide
Answer» Answer is (d) vicinal dibromide CH₂ = CH₂ + Br₂ \(\rightarrow\) BrCH₂ - CH₂Br

28452.

Alkenes decolourise bromine water in presence of CCl4 due to formation of:(a) allyl bromide (b) vinyl bromide (c) bromoform (d) vicinal dibromide

Answer»

Answer is (d) vicinal dibromide

CH₂ = CH₂ + Br₂ \(\rightarrow\) BrCH₂ - CH₂Br

Discussion

28453.	A + ph- SO2Cl → B + KOH → C + C2H2I → D'C' is water solubleCorrect structure of A and D are(1) R-NH2, PhSO2 - NR - (C2H5)2+I-(1) R-NH-R, PhSO2 -NR2 - (C2H5)(1) R-NH2, PhSO2 - NR - I(4) R2NH , Ph - SO2 -NR2 - (C2H5)2+I-
Answer» (1) R-NH₂, PhSO₂- NR - (C₂H₅)₂⁺I^-

Discussion

28454.	Assertion : Glyceraldehyde reacts with Br2/H2O to form achiral compoundReason : -CHO and -CH2OH both are oxidized(1) If both assertion and reason are true and reason is the correct explanation of assertion.(2) If both assertion and reason are true but reason is not the correct explanation of assertion.(3) If assertion is true but reason is false.(4) If both assertion and reason are false.
Answer» (3) If assertion is true but reason is false.

Discussion

28455.	Correct order for reaction with alcoholic KOH(1) a > b > c > d(2) a > c > b > d(3) d > b > c >a(4) a > d > b > c
Answer» (2) a > c > b > d

Discussion

28456.	IUPAC name of (1) 1–Chloro–2–Methyl–4–nitro benzene (2) 2–Chloro–1–Methyl–5–nitro benzene (3) 1–Nitro–1–Methyl–4–nitro benzene (4) 2–Methyl–1–Chloro–4–nitro benzene
Answer» Correct option: (1) 1–Chloro–2–Methyl–4–nitro benzene

28456.

IUPAC name of (1) 1–Chloro–2–Methyl–4–nitro benzene (2) 2–Chloro–1–Methyl–5–nitro benzene (3) 1–Nitro–1–Methyl–4–nitro benzene (4) 2–Methyl–1–Chloro–4–nitro benzene

Answer»

Correct option:

(1) 1–Chloro–2–Methyl–4–nitro benzene

Discussion

28457.	IUPAC name of give compound :(1) 3-Ethyl-4-Amino-hexan-2-ol (2) 3-Amino-4-Ethyl-hexan-5-ol(3) 2-hydroxy-4-Amino hexane (4) 4-Amino-3-ethyl hexan-2-ol
Answer» (4) 4-Amino-3-ethyl hexan-2-ol

Discussion

28458.	Assertion : Tertbutyl methyl ether React with HBr to form tert. butyl (CH3)3 C-Br and CH3-OH methonalReason : It follows SN1 mechanism.(1) If both assertion and reason are true and reason is the correct explanation of assertion.(2) If both assertion and reason are true but reason is not the correct explanation of assertion.(3) If assertion is true but reason is false.(4) If both assertion and reason are false.
Answer» (1) If both assertion and reason are true and reason is the correct explanation of assertion.

Discussion

28459.	Assertion :React with HBr to for (CH3)3CBr and CH3OHReason : It follows SN1 mechanism(1) If both assertion and reason are true and reason is the correct explanation of assertion.(2) If both assertion and reason are true but reason is not the correct explanation of assertion.(3) If assertion is true but reason is false.(4) If both assertion and reason are false.
Answer» (1) If both assertion and reason are true and reason is the correct explanation of assertion.

Discussion

28460.	A sample of drinking water was found to be severely contaminated with chloroform, `CHCl_(3)`, supposed to be carcinogen. The level of contamination was 15 ppm (by mass). (i) Express this in per cent by mass. (ii) Determine the molality of chloroform in the water sample.
Answer» Correct Answer - `a. 15xx10^(-4)g, b. 1.25xx10^(-25)m` a. `pp m=(W_(2))/("Weight of solution")xx10^(6)` `(15)/(10^(6))=(W_(2))/(Weight of solution)` `%` By mass `=(15)/(10^(6))xx100=15xx10^(-4)g` b. `Mw` of `CHMCl_(30=119.5g` `W_(2)=15xx10^(-4)g` Weight of solution `=100g` Weight of solvent `=W_(1)=(100-15xx10^(-4))` `=99.998g` `m=(W_(2)xx1000)/(Mw_(2)xxW_(1))=(15xx10^(-4)xx10^(3))/(119.5xx99.998)` `=1.25xx10^(-5)m`

Discussion

28461.	Acid should be added to water but not water to the acid. Why?
Answer» 1. The dissolving of an acid or base in water is an highly exothermic process. Care must be taken while mixing concentrated HNO₃ or concentrated H₂SO₄ with water. 2. The acid must always be added slowly to water with constant stirring. 3. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause bums. 4. The glass container may also break due to excessive local heating.

28461.

Acid should be added to water but not water to the acid. Why?

Answer»

1. The dissolving of an acid or base in water is an highly exothermic process. Care must be taken while mixing concentrated HNO₃ or concentrated H₂SO₄ with water.

2. The acid must always be added slowly to water with constant stirring.

3. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause bums.

4. The glass container may also break due to excessive local heating.

Discussion

28462.	The unit of thermal conductivity is : (1) J m K–1 (2) J m–1 K–1 (3) W m K–1 (4) W m–1 K–1
Answer» Answer given below: https://bit.ly/2EEgUzm

28462.

The unit of thermal conductivity is : (1) J m K–1 (2) J m–1 K–1 (3) W m K–1 (4) W m–1 K–1

Answer»

Answer given below:

https://bit.ly/2EEgUzm

Discussion

28463.	Which of the following antimuscarinic drugs is often effective in preventing or reversing vestibular disturbances, especially motion sickness? a) Atropine b) Ipratropium c) Scopolamine d) Homatropine
Answer» c) Scopolamine

Discussion

28464.	Atropine causes: a) Miosis, a reduction in intraocular pressure and cyclospasm b) Mydriasis, a rise in intraocular pressure and cycloplegia c) Miosis, a rise in intraocular pressure and cycloplegia d) Mydriasis, a rise in intraocular pressure and cyclospasm
Answer» b) Mydriasis, a rise in intraocular pressure and cycloplegia

Discussion

28465.	The pharmacologic actions of scopolamine most closely resemble those of: a) Hexamethonium b) Atropine c) Succinylcholine d) Pilocarpine
Answer» The pharmacologic actions of scopolamine most closely resemble those of Atropine.

Discussion

28466.	Atropine may cause a rise in body temperature (atropine fever): a) In adults b) In pregnant women c) In infants and children d) All of the above
Answer» c) In infants and children

Discussion

28467.	Antimuscarinics are used in the treatment of the following disorders EXCEPT: a) Motion sickness b) Glaucoma c) Hyperhidrosis d) Asthma
Answer» b) Glaucoma

Discussion

28468.	Indicate muscles, which are more resistant to block and recover more rapidly: a) Hand b) Leg c) Neck d) Diaphragm
Answer» d) Diaphragm

Discussion

28469.	The tissues most sensitive to atropine are: a) The salivary, bronchial and sweat glands b) The gastric parietal cells c) Smooth muscle and autonomic effectors d) The heart
Answer» a) The salivary, bronchial and sweat glands

Discussion

28470.	Let `F_pp, F_pn and F_nn` denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. When the separation is `1 fm`,A. `F_(pp) gt F_(pn) = F_(n n)`B. `F_(pp) =F_(pn) =F_(n n)`C. `F_(pp) gt F_(pn) gt F_(n n)`D. `F_(pp) lt F_(pn) = F_(n n)`
Answer» Correct Answer - B Nuclear force is charge independent

Discussion

28471.	The effect of the drug on parasympathetic function declines rapidly in all organs EXCEPT: a) Eye b) Heart c) Smooth muscle organs d) Glands
Answer» The effect of the drug on parasympathetic function declines rapidly in all organs Except Eye.

Discussion

28472.	In the figure shown, blocks `P` and `Q` are in contact but do not stick to each other. The lower face of `P` behaves as a plane mirror. The springs are in their natural lengths. The system is released from rest. Then the distance between `P` and `Q` when `Q` is at the lowest point first time will be A. `(2mg)/(K)`B. `(mg)/(K)`C. `(4mg)/(K)`D. 0
Answer» Correct Answer - A Both blocks loose contact immediately after the release `T_(P) = 2pi sqrt((m)/(4K)) .T_(Q) = 2 pi sqrt((m)/(K))` `:. T_(Q) = 2T_(P)` Q comes at lowest position at time `(T_(Q))/(2)` travelling a distance `(2mg)/(K)` downwards. In time `(T_(Q))/(2)`, i.e. time period of `P(T_(P))` the block `P` come back to original position `:.` Time distance P and Q is `(2 mg)/(K)`

Discussion

28473.	Monochromatic light of wavelength `lamda` passes through a very narrow slit S and then strikes a screen placed at a distance D = 1m in which there are two parallel slits `S_(1)` and `S_(2)` as shown. Slit `S_(1)` is directly in line with S while `S_(2)` is displaced a distance d to one side. The light is detected at point P on a second screen, equidistant from `S_(1)` and `S_(2)` When either slit `S_(1)` or `S_(2)` is open equal light intensities `I` are measured at point P. When both slits are open, the intensity is three times as large i.e. `3 I`. If the minimum possible wavelength is `Nd^(2)`, then find the value of `N (d lt lt D)`
Answer» Correct Answer - 3 `2I = I+I+2I cos phi` `phi =pi//3 rArr Delta =(lamda)/(6)` Also `Delta = sqrt(D^(2) +d^(2))-D` `=Dsqrt(1+(d^(2))/(D^(2)))-D=D(1+(d^(2))/(D^(2)))^((1)/(2))-D` `=D(1+(1)/(2)(d^(2))/(D^(2)))-D=(1)/(2)(d^(2))/(D)` `:. (1)/(2)(d^(2))/(D)=(lamda)/(6)` or `lamda=3 (d^(2))/(D)`.

Discussion

28474.	The mechanism of atropine action is: a) Competitive ganglion blockade b) Competitive muscarinic blockade c) Competitive neuromuscular blockade d) Noncompetitive neuromuscular blockade
Answer» b) Competitive muscarinic blockade

Discussion

28475.	Indicate the drug, which is rapidly and fully distributed into CNS and has a greater effect than most other antimuscarinic agents? a) Atropine b) Scopolamine c) Homatropine d) Ipratropium
Answer» b) Scopolamine

Discussion

28476.	In the above question, the velocity of the image of `Q` in plane mirror of block `P` with respect to ground when `Q` is at the lowest point first time is:A. `sqrt((2mg^(2))/(K))`B. `sqrt((4mg^(2))/(K))`C. `sqrt((3mg^(2))/(K))`D. 0
Answer» Correct Answer - D At `t = (T_(Q))/(2)` both the blocks are at extreme position and their velocity is zero `:. V_(P) = V_(Q) =0`

Discussion

28477.	At time `t=0`, some radioactive gas is injected into a sealed vessel. At time `T`, some more of the same gas is injected into the same vessel. Which one of the following graphs best represents the variation of the logarithm of the activity `A` of the gas with time `t`?A. B. C. D.
Answer» Correct Answer - B `A - A_(01) e^(-lamda t)` `l n A - l n A_(0) - lamda t` `l n` A versus t is a linearly decreasing graph with slope depending to `lamda` As `lamda` does not change, slope is charge remains same.

Discussion

28478.	Hexamethonium blocks the action of acethylcholine and similar agonists at: a) Muscarinic receptor site b) Neuromuscular junction c) Autonomic ganglia d) Axonal transmission
Answer» c) Autonomic ganglia

Discussion

28479.	A 200Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be -(1) 100Ω (2) 500Ω (3) 400Ω (4) 300Ω
Answer» Correct option (2) 500Ω Explanation: Red → Green ⇒200Ω → 500Ω

28479.

A 200Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be -(1) 100Ω (2) 500Ω (3) 400Ω (4) 300Ω

Answer»

Correct option (2) 500Ω

Explanation:

Red → Green ⇒200Ω → 500Ω

Discussion

28480.	Free `^238 U` nuclei kept in a train emit alpha particles. When the train is stationary and a uranium nucleus decays, a passenger measues that the separation betwee the alpha particle and the recoiling nucleus becomes `x` in time `t` after the decay. If a decay takes place when the train is moving at a uniform speed `v`, the distance between the alpha particle and the recoiling nucleus at a time `t` after the decay, as measured by the passenger will beA. `x + upsilont`B. `x -upsilon t`C. `x`D. depends on the direction of the train
Answer» Correct Answer - C The decay law will remain same even in the train. The velocities of the `alpha` - partilce and the recoiling nucleus will be same on the ground and in the train with respect to train.

Discussion

28481.	The first reaction unique to purine nucleotide synthesis is catalysed by (A) PRPP synthetase (B) PRPP glutamyl amido transferase (C) Phosphoribosyl glycinamide synthetase (D) Formyl transferase
Answer» (B) PRPP glutamyl amido transferase

Discussion

28482.	Complete absence of hypoxanthine guanine phospharibosyl transferase causes (A) Primary gout (B) Immunodeficiency (C) Uric acid stones (D) Lesh-Nyhan syndrome
Answer» (D) Lesh-Nyhan syndrome

Discussion

28483.	The gene of lac operon which has constitutive expression is (A) i (B) c (C) z (D) p
Answer» The gene of lac operon which has constitutive expression is i.

Discussion

28484.	A pyrimidine nucleotide is (A) GMP (B) AMP (C) CMP (D) IMP
Answer» A pyrimidine nucleotide is CMP.

Discussion

28485.	Free purine bases which can be salvaged are (A) Adenine and guanine (B) Adenine and hypoxanthine (C) Guanine and hypoxanthine (D) Adenine, guanine and hypoxanthine
Answer» (D) Adenine, guanine and hypoxanthine

Discussion

28486.	From DNA the genetic message is transcribed into this compound: (A) Protein (B) mRNA (C) tRNA (D) rRNA
Answer» Correct option (B) mRNA

28486.

From DNA the genetic message is transcribed into this compound: (A) Protein (B) mRNA (C) tRNA (D) rRNA

Answer»

Correct option (B) mRNA

Discussion

28487.	The gene which is transcribed during repression is (A) Structural (B) Regulator (C) Promoter (D) Operator
Answer» (B) Regulator

Discussion

28488.	Adenine is(A) 6-Amino purine (B) 2-Amino-6-oxypurine(C) 2-Oxy-4-aminopyrimidine (D) 2, 4-Dioxypyrimidine
Answer» (A) 6-Amino purine

Discussion

28489.	2, 4-Dioxypyrimidine is (A) Thymine (B) Cystosine (C) Uracil (D) Guanine
Answer» 2, 4-Dioxypyrimidine is Uracil.

Discussion

28490.	Which of the following is transcribed during repression? (A) Structural gene (B) Promoter gene (C) Regulator gene (D) Operator gene
Answer» (C) Antisense strand of DNA

Discussion

28491.	The chemical name of guanine is (A) 2,4-Dioxy-5-methylpyrimidine (B) 2-Amino-6-oxypurine (C) 2-Oxy-4-aminopyrimidine (D) 2, 4-Dioxypyrimidine
Answer» (B) 2-Amino-6-oxypurine

Discussion

28492.	Nucleotides and nucleic acids concentration are often also expressed in terms of (A) ng (B) mg (C) meq (D) OD at 260 nm
Answer» (D) OD at 260 nm

28492.

Nucleotides and nucleic acids concentration are often also expressed in terms of (A) ng (B) mg (C) meq (D) OD at 260 nm

Answer»

(D) OD at 260 nm

Discussion

28493.	Bacteria are prokaryotic cells, i.e., they do not have a membrane-delimited nucleus. Eukaryotes have cells with a delimited nucleus. Where in these types of cells can DNA be found?
Answer» In eukaryotic cells DNA is found within the cell nucleus. In prokaryotic cells DNA is found dispersed in the cytosol, the fluid space inside the cell. Other DNA molecules can also be found within mitochondria and chloroplasts, specialized organelles of eukaryotic cells.

28493.

Bacteria are prokaryotic cells, i.e., they do not have a membrane-delimited nucleus. Eukaryotes have cells with a delimited nucleus. Where in these types of cells can DNA be found?

Answer»

In eukaryotic cells DNA is found within the cell nucleus. In prokaryotic cells DNA is found dispersed in the cytosol, the fluid space inside the cell.

Other DNA molecules can also be found within mitochondria and chloroplasts, specialized organelles of eukaryotic cells.

Discussion

28494.	Some hormones produce their intracellular effects by activating (A) Phospholipae A1 (B) Phospholipase B (C) Phospholipase C (D) All of these
Answer» (D) All of these

Discussion

28495.	Which are the nucleotides “portions” that bind in the formation of nucleic acids? What is meant by the 5’ and 3’ extremities of nucleic acids?
Answer» The phosphate group of one nucleotide binds to the pentose of the other nucleotide and so on to make the polynucleotide chain. Each extremity of a DNA or RNA chain can be distinguished from the other extremity according to their terminal chemical entity. The phosphate-ended extremity is called 5’-extremity and the pentose-ended extremity is called 3’-extremity. So DNA or RNA chains can be run along the 5’-3’ way or along the 3’-5’ way. These ways are important in several biological functions of DNA and RNA since some reactions specifically occur following one way or the other way.

28495.

Which are the nucleotides “portions” that bind in the formation of nucleic acids? What is meant by the 5’ and 3’ extremities of nucleic acids?

Answer»

The phosphate group of one nucleotide binds to the pentose of the other nucleotide and so on to make the polynucleotide chain.

Each extremity of a DNA or RNA chain can be distinguished from the other extremity according to their terminal chemical entity. The phosphate-ended extremity is called 5’-extremity and the pentose-ended extremity is called 3’-extremity. So DNA or RNA chains can be run along the 5’-3’ way or along the 3’-5’ way. These ways are important in several biological functions of DNA and RNA since some reactions specifically occur following one way or the other way.

Discussion

28496.	Synthesis of RNA molecule is terminated by a signal which is recognised by (A) α-factor (B) β-factor (C) δ-factor (D) ρ
Answer» Correct option (D) ρ

Discussion

28497.	If in a nucleic acid there are more than 8000 nucleotides it is most likely (A) RNA (B) DNA (C) Both (A) and (B) (D) None of these
Answer» Correct option (B) DNA

Discussion

28498.	Embryo rescue
Answer» Embryo rescue is one of the earliest and successful forms of in-vitro culture techniques that is used to assist in the development of plant embryos that might not survive to become viable plants.

Discussion

28499.	Bacterial ribsomes are composed of
Answer» Bacterial ribosomes are composed of a small (30S) and a large (50S) subunit, The small subunit (30S) consists of a large, highly structured RNA molecule of over 1500 nucleotides (the 16S rRNA), along with 21 proteins (referred to as S1 through S21).

Discussion

28500.	What was used to prove that the source of oxygen evolved during photosynthesis is water?
Answer» Heavy isotope of oxygen `.^(18)O_(2)` was used to prove that the source of oxygen evolved during photosynthesis is water.

Discussion

Explore topic-wise InterviewSolutions in .

Alkenes decolourise bromine water in presence of CCl4 due to formation of:(a) allyl bromide (b) vinyl bromide (c) bromoform (d) vicinal dibromide

A + ph- SO2Cl → B + KOH → C + C2H2I → D'C' is water solubleCorrect structure of A and D are(1) R-NH2, PhSO2 - NR - (C2H5)2+I-(1) R-NH-R, PhSO2 -NR2 - (C2H5)(1) R-NH2, PhSO2 - NR - I(4) R2NH , Ph - SO2 -NR2 - (C2H5)2+I-

Correct order for reaction with alcoholic KOH(1) a &gt; b &gt; c &gt; d(2) a &gt; c &gt; b &gt; d(3) d &gt; b &gt; c &gt;a(4) a &gt; d &gt; b &gt; c

IUPAC name of (1) 1–Chloro–2–Methyl–4–nitro benzene (2) 2–Chloro–1–Methyl–5–nitro benzene (3) 1–Nitro–1–Methyl–4–nitro benzene (4) 2–Methyl–1–Chloro–4–nitro benzene

IUPAC name of give compound :(1) 3-Ethyl-4-Amino-hexan-2-ol (2) 3-Amino-4-Ethyl-hexan-5-ol(3) 2-hydroxy-4-Amino hexane (4) 4-Amino-3-ethyl hexan-2-ol

A sample of drinking water was found to be severely contaminated with chloroform, `CHCl_(3)`, supposed to be carcinogen. The level of contamination was 15 ppm (by mass). (i) Express this in per cent by mass. (ii) Determine the molality of chloroform in the water sample.

Acid should be added to water but not water to the acid. Why?

The unit of thermal conductivity is : (1) J m K–1 (2) J m–1 K–1 (3) W m K–1 (4) W m–1 K–1

Which of the following antimuscarinic drugs is often effective in preventing or reversing vestibular disturbances, especially motion sickness? a) Atropine b) Ipratropium c) Scopolamine d) Homatropine

Atropine causes: a) Miosis, a reduction in intraocular pressure and cyclospasm b) Mydriasis, a rise in intraocular pressure and cycloplegia c) Miosis, a rise in intraocular pressure and cycloplegia d) Mydriasis, a rise in intraocular pressure and cyclospasm

The pharmacologic actions of scopolamine most closely resemble those of: a) Hexamethonium b) Atropine c) Succinylcholine d) Pilocarpine

Atropine may cause a rise in body temperature (atropine fever): a) In adults b) In pregnant women c) In infants and children d) All of the above

Antimuscarinics are used in the treatment of the following disorders EXCEPT: a) Motion sickness b) Glaucoma c) Hyperhidrosis d) Asthma

Indicate muscles, which are more resistant to block and recover more rapidly: a) Hand b) Leg c) Neck d) Diaphragm

The tissues most sensitive to atropine are: a) The salivary, bronchial and sweat glands b) The gastric parietal cells c) Smooth muscle and autonomic effectors d) The heart

The effect of the drug on parasympathetic function declines rapidly in all organs EXCEPT: a) Eye b) Heart c) Smooth muscle organs d) Glands

The mechanism of atropine action is: a) Competitive ganglion blockade b) Competitive muscarinic blockade c) Competitive neuromuscular blockade d) Noncompetitive neuromuscular blockade

Indicate the drug, which is rapidly and fully distributed into CNS and has a greater effect than most other antimuscarinic agents? a) Atropine b) Scopolamine c) Homatropine d) Ipratropium

In the above question, the velocity of the image of `Q` in plane mirror of block `P` with respect to ground when `Q` is at the lowest point first time is:A. `sqrt((2mg^(2))/(K))`B. `sqrt((4mg^(2))/(K))`C. `sqrt((3mg^(2))/(K))`D. 0

At time `t=0`, some radioactive gas is injected into a sealed vessel. At time `T`, some more of the same gas is injected into the same vessel. Which one of the following graphs best represents the variation of the logarithm of the activity `A` of the gas with time `t`?A. B. C. D.

Hexamethonium blocks the action of acethylcholine and similar agonists at: a) Muscarinic receptor site b) Neuromuscular junction c) Autonomic ganglia d) Axonal transmission

A 200Ω resistor has a certain color code. If one replaces the red color by green in the code, the new resistance will be -(1) 100Ω (2) 500Ω (3) 400Ω (4) 300Ω

The first reaction unique to purine nucleotide synthesis is catalysed by (A) PRPP synthetase (B) PRPP glutamyl amido transferase (C) Phosphoribosyl glycinamide synthetase (D) Formyl transferase

Complete absence of hypoxanthine guanine phospharibosyl transferase causes (A) Primary gout (B) Immunodeficiency (C) Uric acid stones (D) Lesh-Nyhan syndrome

The gene of lac operon which has constitutive expression is (A) i (B) c (C) z (D) p

A pyrimidine nucleotide is (A) GMP (B) AMP (C) CMP (D) IMP

Free purine bases which can be salvaged are (A) Adenine and guanine (B) Adenine and hypoxanthine (C) Guanine and hypoxanthine (D) Adenine, guanine and hypoxanthine

From DNA the genetic message is transcribed into this compound: (A) Protein (B) mRNA (C) tRNA (D) rRNA

The gene which is transcribed during repression is (A) Structural (B) Regulator (C) Promoter (D) Operator

Adenine is(A) 6-Amino purine (B) 2-Amino-6-oxypurine(C) 2-Oxy-4-aminopyrimidine (D) 2, 4-Dioxypyrimidine

2, 4-Dioxypyrimidine is (A) Thymine (B) Cystosine (C) Uracil (D) Guanine

Which of the following is transcribed during repression? (A) Structural gene (B) Promoter gene (C) Regulator gene (D) Operator gene

The chemical name of guanine is (A) 2,4-Dioxy-5-methylpyrimidine (B) 2-Amino-6-oxypurine (C) 2-Oxy-4-aminopyrimidine (D) 2, 4-Dioxypyrimidine

Nucleotides and nucleic acids concentration are often also expressed in terms of (A) ng (B) mg (C) meq (D) OD at 260 nm

Bacteria are prokaryotic cells, i.e., they do not have a membrane-delimited nucleus. Eukaryotes have cells with a delimited nucleus. Where in these types of cells can DNA be found?

Some hormones produce their intracellular effects by activating (A) Phospholipae A1 (B) Phospholipase B (C) Phospholipase C (D) All of these

Which are the nucleotides “portions” that bind in the formation of nucleic acids? What is meant by the 5’ and 3’ extremities of nucleic acids?

Synthesis of RNA molecule is terminated by a signal which is recognised by (A) α-factor (B) β-factor (C) δ-factor (D) ρ

If in a nucleic acid there are more than 8000 nucleotides it is most likely (A) RNA (B) DNA (C) Both (A) and (B) (D) None of these

Embryo rescue

Bacterial ribsomes are composed of

What was used to prove that the source of oxygen evolved during photosynthesis is water?

Correct order for reaction with alcoholic KOH(1) a > b > c > d(2) a > c > b > d(3) d > b > c >a(4) a > d > b > c