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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 10701. |
What is chemiosmosis? Who proposed the chemiosmotic hypothesis? |
| Answer» The movement of ions across a selectively permeable membrane down their electrochemical gradient is called chemiosmosis and Dr Mitchell proposed the chemiosmotic hypothesis. | |
| 10702. |
Name the two photosynthetic pigments belonging to carotenoides. |
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Answer» Carotene and xanthophylls |
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| 10703. |
What are the two main types of carotenoids ? Name the two photosynthetic pigments belonging to them. |
| Answer» Carotenes and xanthophylls are the two main types of carotenoids. `beta` carotene and lutein are two pigments belonging to them. | |
| 10704. |
Name the reaction centre in PS I and PS II. |
| Answer» Reaction centre in PS I is Chl a `(P_(700))` and in PS II is Chl a `(P_(680))`. | |
| 10705. |
What is Hill Reaction? |
| Answer» The splitting of water molecule into hydrogen and oxygen is called photolysis of water or Hill Reaction. | |
| 10706. |
Which ions are present in PS II? What role do the play? |
| Answer» PS II contains calcium, magnesium and chloride ions which play an important role in photolysis of water. | |
| 10707. |
Which ions are present in PS II? What role do they play? |
| Answer» PS II contains calcium, magnesium and chloride ions which play an important role in photolysis of water. | |
| 10708. |
Give the expanded form of C C and LHC. |
| Answer» The expanded form of C C and LHC are core complex and light harvesting complex respectively. | |
| 10709. |
What is plastidome? |
| Answer» Circular, closed, naked ring of DNA present in chloroplast is called plastidome. | |
| 10710. |
What is quantasome? |
| Answer» A quantasome is a photosynthetic unit where the photosynthetic pigments are located. | |
| 10711. |
Give three examples of chemoautotrophs. |
| Answer» Nitrosomonas, Thiobacillus and Ferrobacillus are the three examples of chemoautotrophs. | |
| 10712. |
Ceramide is present in all of the following except (A) Plasmalogens (B) Cerebrosides (C) Sulphatides (D) Sphingomyelin |
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Answer» (A) Plasmalogens |
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| 10713. |
Meosomes are |
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Answer» Meosomes are the part of Plasma membrane. |
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| 10714. |
The viruses that lives as parasiteson bacteria are |
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Answer» The viruses that live as parasites on bacteria are Bacteriophages. |
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| 10715. |
Inosine monophophate is an intermediate during the de novo synthesis of (A) AMP and GMP (B) CMP and UMP (C) CMP and TMP (D) All of these |
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Answer» (A) AMP and GMP |
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| 10716. |
Nucleotides required for the synthesis of nucleic acids can be obtained from (A) Dietary nucleic acids and nucleotides (B) De novo synthesis (C) Salvage of pre-existing bases and nucleosides (D) De novo synthesis and salvage |
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Answer» (D) De novo synthesis and salvage |
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| 10717. |
The functions of plasmid are |
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Answer» Plasmids provide a mechanism for horizontal gene transfer within a population of microbes and typically provide a selective advantage under a given environmental state. Plasmids may carry genes that provide resistance to naturally occurring antibiotics in a competitive environmental niche, or the proteins produced may act as toxins under similar circumstances. Plasmids can also provide bacteria with the ability to fix elemental nitrogen or to degrade recalcitrant organic compounds that provide an advantage when nutrients are scarce. |
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| 10718. |
Gram staining an example for |
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Answer» The Gram stain color and the bacterial shape give clues as to what bacteria might be causing the infection. One example of gram-positive cocci is Staphylococcus aureus, the bacteria associated with staph infections. An example of gram-negative bacteria is Escherichia coli, the cause of many urinary tract infections. |
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| 10719. |
Xanthosine monophosphate is an intermediate during de novo synthesis of (A) TMP (B) CMP (C) AMP (D) GMP |
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Answer» Correct option (D) GMP |
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| 10720. |
De novo synthesis of purine nucleotide occurs in (A) Mitochondria (B) Cytosol (C) Microsmes (D) Ribosomes |
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Answer» Correct option (B) Cytosol |
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| 10721. |
In electron microscope source of electron is form |
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Answer» In electron microscope source of electron is form a. Mercury lamp b. Tungsten metal |
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| 10722. |
`1 M NaCl` and `1 M HCl` are present in an aqueous solution. The solution isA. not a buffer solution and pH`lt7`B. not a buffer solution and pH`gt7`C. a buffer solution and pH`lt7`D. a buffer solution and pH `gt7` |
| Answer» Correct Answer - A | |
| 10723. |
In the pathway of de novo synthesis of purine nucleotides, all the following are allosteric enzymes except (A) PRPP glutamyl amido transferase (B) Adenylosuccinate synthetase (C) IMP dehydrogenase (D) Adenylosuccinase |
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Answer» (D) Adenylosuccinase |
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| 10724. |
The nitrogen atoms for de novo synthesis of purine nucleotides are provided by (A) Aspartate and glutamate (B) Aspartate and glycine (C) Aspartate, glutamine and glycine (D) Aspartate, glutamate and glycine |
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Answer» (C) Aspartate, glutamine and glycine |
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| 10725. |
An enzyme which acts as allosteric regulator and sensitive to both phosphate concentration and to the purine nucleotides is (A) PRPP synthetase (B) PRPP glutamyl midotransferase (C) HGPR Tase (D) Formyl transferase |
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Answer» (A) PRPP synthetase |
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| 10726. |
`0.1M` `CH_(3)COOH(aq.)` Is mixed with `0.1M` `NaOH(aq.).` The pH of solution on mixing will be (`K_(a)` of `CH_(3)COOH` is `1.8xx10^(-5)`A. `4.74`B. `8.70`C. `9.75`D. None of the above |
| Answer» Correct Answer - B | |
| 10727. |
The available PRPP is used preferentially for(A) De novo synthesis of purine nucleotides (B) De novo synthesis of pyrimidine nucleotides (C) Salvage of purine bases (D) Salvage of pyrimidine bases |
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Answer» (C) Salvage of purine bases |
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| 10728. |
X-ray from a tube with a target `A` of atomic number `Z` shows strong `K` lines for target `A` and weak`K` lines for impurities. The wavelength og `K_(alpha)` lines is `lambda_(z)` for target `A` and `lambda_(1) and lambda_(2)` for two impurities. `(lambda_(z))/(lambda_(1)) = 4 and (lambda_(z))/(lambda_(2)) = (1)/(4)` Assuming the screeining contant of `K_(alpha)` lines to be unity select the correct statement(s).A. The atomic number of first impurity is 2Z-1B. The atomic number of first impurity is 2Z+1C. The atomic number of first impurity is `(Z+1)/2`D. The atomic number of second impurity is Z/2+1 |
| Answer» `{:((lambda_(0))/(lambda_(1))=4,implies,((Z_(1)-1)^(2))/((Z-1)^(2))=4,implies,Z_(1)=2Z-1),((lambda_(0))/(lambda_(2))=1/4,implies,((Z_(2)-1)^(2))/((Z-1)^(2))=4,implies,Z_(2)=(Z+1)/2):}` | |
| 10729. |
Which relation is incorrect about hydrolysis of WASB salt ?A. `[H_(+)]=sqrt((K_(w)xxK_(a))/(c)`B. `pOH=1/2(pk_(w)-pK_(a)-logC)`C. `[OH^(-)]=sqrt((K_(w)xxC)/(K_(a))`D. None of these |
| Answer» Correct Answer - D | |
| 10730. |
6-Mercapto purine inhibits the conversion of (A) IMP→ XMP (B) Ribose 5 phosphate → PRPP (C) PRPP → 5-phospho →β -D-ribosylamine (D) Glycinamide ribosyl 5-phosphate → formylglycinamide ribosyl-5-phosphate |
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Answer» (A) IMP→ XMP |
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| 10731. |
A metallic sphere floats in an immiscible mixture of water `(rho_(w)=10^(3)kg//m^(3))` and a liquid `(rho_(L)=13.5xx10^(3)kg//m^(3))` such that its `(4)/(5)th` volume is in water and `(1)/(5)th` volume in the liquid. Find the density of metal.A. `4.5 xx 10^(3) kg//m^(3)`B. `4.0 xx 10^(3) kg//m^(3)`C. `3.5 xx 10^(3) kg//m^(3)`D. `1.9 xx 10^(3) kg//m^(3)` |
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Answer» Correct Answer - C `10_(3)=(4)/(5)+13.5 xx 10_(3)xx(1)/(5) = rhoxx1` or `rho=3.5 xx 10_(3) kg//m_(3)`. |
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| 10732. |
X-ray from a tube with a target `A` of atomic number `Z` shows strong `K` lines for target `A` and weak`K` lines for impurities. The wavelength og `K_(alpha)` lines is `lambda_(z)` for target `A` and `lambda_(1) and lambda_(2)` for two impurities. `(lambda_(z))/(lambda_(1)) = 4 and (lambda_(z))/(lambda_(2)) = (1)/(4)` Assuming the screeining contant of `K_(alpha)` lines to be unity select the correct statement(s).A. The atomic number of first impurity is `2Z -1`B. The atomic number of first impurity is `2Z +1`C. The atomic number of second impurity is `(Z +1)/(2)`D. The atomic number of second impurity is `(Z)/(2)+1` |
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Answer» Correct Answer - A::C `{:((lamda_(0))/(lamda_(1))=4,rArr,((Z_(1)-1)^(2))/((Z-1)^(2))=4),(,rArr,Z_(1)=2Z-1),((lamda_(0))/(lamda_(2))=(1)/(4),rArr,((Z_(2)-1)^(2))/((Z-1)^(2))=(1)(1)/(2)),(,rArr,Z_(2)=(Z+1)/(2)):}` |
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| 10733. |
A saturated soltion of `Mg(OH)_(2)` in water at `25^(@)C` contains `0.11g Mg(OH)_(2)` per litre of solution . The solubility product of `Mg(OH)_(2)` is `:-`A. `0.0121`B. `0.0013`C. 0.0053`D. none of the above |
| Answer» Correct Answer - D | |
| 10734. |
In the biosynthesis of purine nucleotides the AMP feed back regulates (A) Adenylosuccinase (B) Adenylosuccinate synthetase (C) IMP dehydrogenase (D) HGPR Tase |
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Answer» (B) Adenylosuccinate synthetase |
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| 10735. |
The major determinant of the overall rate of denovo purine nucleotide biosynthesis is the concentration of (A) 5-phosphoribosyl 1-pyrophosphate (B) 5-phospho β-D-ribosylamine (C) Glycinamide ribosyl-5-phosphate (D) Formylglycinamide ribosyl-5-phosphate |
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Answer» (A) 5-phosphoribosyl 1-pyrophosphate |
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| 10736. |
What is Simple Microscope? |
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Answer» A simple microscope is a magnifying glass that has a double convex lens with a short focal length. Examples of this kind of instrument include the hand lens and reading lens. When an object is kept near the lens, then its principal focus with an image is produced, which is erect and bigger than the original object. |
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| 10737. |
In an `alpha` -decay, the kinetic energy of `alpha`-particles is `48 MeV` and `Q` value of the reaction is `50 MeV`. The mass number of the mother nucleus is (assume that daughter nucleus is in ground state)A. 96B. 100C. 104D. none of these |
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Answer» Correct Answer - B `K_(alpha) = ((A-4)/(A)) Q` `48 = ((A-4)/(A)) 50` `48A = 50A - 200 rArr 200 = 2A rArr A = 100` |
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| 10738. |
Which of the following is a required substrate for purine biosynthesis?5-methylthymidine Ribose-5-phosphate 5-phosphoribosyl-1-pyrophosphate 5-fluorouracil |
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Answer» The correct option is (2) Ribose-5-phosphate. Purine synthesis is a ten-step process that requires ribose-5-phosphate from the PPP, glycine and formate from the serine/glycine synthesis pathway, glutamine, and TCA cycle-derived aspartate. |
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| 10739. |
Indicate the antimuscarinic drug, which is used as a mydriatic: a) Pilocarpine b) Neostigmine c) Homatropine d) Ipratropium |
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Answer» c) Homatropine |
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| 10740. |
Atropine is frequently used prior to administration of inhalant anesthetics to reduce: a) Muscle tone b) Secretions c) Nausea and vomitingd) All of the above |
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Answer» b) Secretions |
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| 10741. |
Contraindications to the use of antimuscarinic drugs are all of the following except: a) Glaucoma b) Myasthenia c) Bronchial asthma d) Paralyticileus and atony of the urinary bladder |
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Answer» c) Bronchial asthma |
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| 10742. |
Indicate an antimuscarinic drug, which is effective in the treatment of mushroom poising: a) Pralidoxime b) Pilocarpine c) Homatropine d) Atropine |
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Answer» d) Atropine |
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| 10743. |
Which of the following drugs is useful in the treatment of Parkinson′s disease? a) Benztropine b) Edrophonium c) Succinylcholine d) Hexamethonium |
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Answer» Benztropine drugs is useful in the treatment of Parkinson′s disease. |
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| 10744. |
Which of the following drugs is useful in the treatment of uterine spasms? a) Carbachol b) Vecuronium c) Atropine d) Edrophonium |
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Answer» Atropine drugs is useful in the treatment of uterine spasms. |
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| 10745. |
Atropine is now rarely used for the treatment of peptic ulcer because of: a) Slow gastric empting and prolongation of the exposure of the ulcer bed to acid b) Low efficiency and necessity of large doses c) Adverse effects d) All of the above |
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Answer» d) All of the above |
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| 10746. |
The treatment of the antimuscarinic effects can be carried out with: a) Neostigmine b) Hexametonium c) Homatropine d) Acetylcholine |
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Answer» a) Neostigmine |
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| 10747. |
Explain briefly how do all factors influence the rate of transpiration by humidity |
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Answer» Because cooler air holds less water, its relative humidity increases or it is 'moister air'. Therefore, warmer air will increase the driving force for transpiration and cooler air will decrease the driving force for transpiration. |
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| 10748. |
Atropine causes: a) Spasmolitic activity b) Intestinal hypermotility c) Stimulation of contraction in the gut d) Stimulation of secretory activity |
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Answer» a) Spasmolitic activity |
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| 10749. |
The atropine poisoning includes all of the following symptoms EXCEPT: a) Mydriasis, cycloplegia b) Hyperthermia, dry mouth, hot and flushed skin c) Agitation and delirium d) Bradicardia, orthostatic hypotension |
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Answer» d) Bradicardia, orthostatic hypotension |
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| 10750. |
Compared with atropine, scopolamine has all of the following properties EXCEPT: a) More marked central effect b) Less potent in decreasing bronchial, salivary and sweat gland secretion c) More potent in producing mydriasis and cycloplegia d) Lower effects on the heart, bronchial muscle and intestines |
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Answer» b) Less potent in decreasing bronchial, salivary and sweat gland secretion |
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