Explore topic-wise InterviewSolutions in Current Affairs.

When the foodstuffs are boiled, the microorganisms present in them are destroyed.

Yes, the time in which the foodstuffs gets spoilt is different in different seasons. Spoilage of any foodstuffs depends on the presence of temperature and humidity of the environment. Therefore in winter, foodstuffs are preserved for a long time than summer season.

l sub-shell has 3 orbitals. Each orbital accommodates 2 electrons. So 6 electrons can be filled in l sub-shell.

The maximum number of electrons that can be accommodated in a sub-shell is 2(2l +1) (where l is orbital quantum number).

According to Boyle's law.

V ∝ 1/p (at constant T and n)

According to Charle's law

V ∝ 1/T (at constant p and n)

According to Avogadro's law

V ∝ n (at constant T and P)

By combining the three laws.

V ∝ nT/p or pV = nT

pV = nRT

where R is a constant called universal gas constant.

According to Boyle’s law, V ∝ 1/P (at constant T and n) 

According to Charle’s law, V ∝ 1/T(at constant P and n) 

According to Avogadro’s law, V ∝ (at constant T and P) 

Combining the three laws, V ∝ nT/P or PV ∝ nRT 

Or PV = nRT where R is a constant called universal gas constant.

\(C_{rms} = \sqrt{\frac{3RT}{M}}\)

= \(\sqrt{\frac{3 \times 8.314 \times 300}{0.032 kg mol^{-1}}}\)

= 483.6 ms^-1

C_rms = \(\sqrt{\frac{3RT}{M}}\)

For CH₄, M = 16, T = 300 K

C_rms = \(\sqrt{\frac{3R\times300}{16}}\)

For SO₂, M = 64, T = ?

C_rms = \(\sqrt{\frac{3R\times T}{64}}\)

\(\sqrt{\frac{300}{16}}=\sqrt{\frac{T}{64}}\)

T = \(\frac{300\times64}{16}\)

= 1200

t = 1200 - 273

= 927ºC.

(b) If both A & R are correct, but R is not the correct explanation of the assertion.

I like to stand up and tell my teacher that I have not done my homework because I want to be truthful. 

I don’t like to stand up and tell my teacher that I have not done my homework fearing punishment.

I like to tell my parents truthfully that I spent Rs. 25/- they gave for vegetables on buying ice-cream because I don’t want to him. 

I don’t like to tell my parents truthfully that I spent Rs.25/- they gave for vegetables on buying ice-cream because they will scold and beat me.

(b) Both A and R are true and R is the not correct explanation of A.

1. d. Mr. Barua felt surprised to know that Rajvir knows a lot about tea plants.

2. b. Mr. Barua wanted to allow a tractor through pulling a trailer-load of tea leaves to pass.

3. c. Rajvir and Mr Barua were going to Dekhiabari Tea Estate.

4. d. Rajvir wanted to learn more about tea. Hence he wanted to stay there.

5. a. The sprouting period is also known as the Second Bush.

(a) Both A and R are true and R is the correct explanation of A.

(i) Chinese legend : A Chinese emperor always boiled water before drinking it. One day a few leaves of branches burning under the pot fell- into the water. It gave a delicious flavour. These were tea leaves.

(ii) Indian legend : Bodhidharma, a Buddhist monk cut off his eyelids because he felt sleepy during meditations. Ten tea plants grew out of the eyelids. These leaves when put in hot water and drunk, banished sleep.

The Coorgi tradition of courage and bravery has been recognised by awarding the Coorg Regiment with the most number of gallantry awards. Besides, the Coorgis are the only Indians allowed to carry firearms without a licence.

1. Roots, stem and leaves 

2. Leaf fall and dormancy 

3. Pituitary 

4. Pituitary

5. ADH 

6. isthumus 

7. Beta 

8. normal 

9. 80 – 120 

10. Glucogon 

11. oestrogen 

12. Cortisone 

13. LTH 

14. Oxytocin 

15. duct less

Gases possess the property of diffusion which is independent of the force of gravitation. Due to diffusion, the gases mix into each other and remain almost uniformly distributed in the atmosphere.

The auxins produced by the apical buds suppress the growth of lateral bud is called apical dominance.

1. d. Their tradition of hospitality is famous about the Coorgi homes.

2. b. Kodavus are the only people in India who are permitted to carry firearms without a licence.

3. b. Coorg Regiment has received the maximum number of awards for bravery.

4. a. Coorgi people like to narrate numerous tales of valour related to their sons and fathers.

5. a. General Cariappa was the first Chief of the Indian Army.

1. d. Coorgi people tell their children the tales of bravery of their sons and fathers.

2. a. The first Chief of Indian Army, General Cariappa, was a Coorgi.

3. c. The narrator says that Coorg Regiment has won many medals and awards for actions of bravery in battlefields.

4. b. A large water fish named Mahaseer is abound in the rivers of Coorg.

5. a. Kaveri obtains its water from hills and forests of Coorg.

1. Auxin 

2. Ethylene 

3. Abscisic acid 

4. Rosette 

5. Ethylene 

6. Parathormone 

7. Insulin 

8. Thyroid Stimulating Hormone (TSH) 

9. Cretinism

(c) Apical shoot meristem

(b) Elongation of dwarf plants

(a) Growth regulators

Correct Answer is: (d) All

The hormone which has a positive effect on apical dominance is Auxin.

(c) Anterior pituitary

Correct Answer is: (a) 2, 4-D

Correct Answer is; (d) Ethylene

(d) F.W. Went.

The branch of botany which deals with ageing, abscission and senescence is called Phytogerontology.

During epigeal germination cotyledons are pushed out of the soil. This happens due to the elongation of the hypocotyl. eg: Castor and Bean.

Source of O₂ In Photosynthesis is water:

(i) It was previously assumed that the source of oxygen in photosynthesis was CO₂ and not H₂O molecules. 

(ii) According to recent studies, oxygen is evolved from water and not from CO₂. 

(iii) It was proved by the use of radioactive elements For example, the water containing heavy oxygen (H₂O₁₈) was supplied to the leaves in place of natural osygen, (H₂O₁₆). 

(iv) On observation it was found that oxygen evolved in photosynthesis was heavy oxygen ¹⁸O₂ and not the natural oxygen. 

(v) Now, the heavy isotope of carbon dioxide (C₁₄O₂) was supplied to the plant. 

(vi) Thus, it showed that in photosynthesis, oxygen is evolved from water molecules and not from carbon dioxide.

Full form of RuBP is Ribulose 1, 5 biphosphate. RuBP is the first acceptor of atmospheric CO₂ during dark reaction of photosynthesis. The reaction is called carboxylation. 

6RuBP + 6CO₂ + 6CH₂O → Unstable 6C compound → 3PGA 

RuBP is regenerated during final formation of sugar molecule.

A factor influencing a physiological process has three principle values called cardinal points, minimum, optimum and maximum. 

(i) The minimum of a factor is that valiue below which the physiological process cannot continue. 

(ii) Optimum value is that point where the physiological process can continue indefinitely at its highest velocity. 

(iii) Maximum value is that beyond which the process comes to stop.

(i) For existence of life, food and O₂ are very essential. Photosynthesis is the only process which can trap solar energy and can synthesis food for own and all other organisms. During photosynthesis, O₂ is given out and CO₂ is taken. So, it keeps balance of O₂ and CO₂ in nature. Thus, photosynthesis is essential for existence of life. 

(ii) In bacterial photosynthesis, the raw material of the supply of proton (H⁺) is H₂S. than H₂O. Thus, there is production of Sulphur and not oxygen. 

(iii) Chlorophyll-b and other pigments of a reaction centre or photosystem absorb solar energy and transfer it to chlorophyll-a. Ultimately it is the chlorophylI-a that initiates the photosynthesis process.

RuBlisCO-Ribulose bisphosphate carboxylase oxygenase RuBisCo brings about carboxylation during Calvin cycle in photosynthesis. Under high concentration of oxygen and increase in temperature, RuBisCo act as oxygenase and carry out photorespiration.

(b) A – (v), C – (ii), D – (iv), E – (vi), F – (iii)

Correct Answer is : (a) 3 inches

The condition of a seed when it fails to germinate even in suitable environmental condition is called seed dormancy.

(b) respiration

(a) overcome unfavorable climatic conditions

Abscisic Acid 

Gibberellins is associated with the discovery of which hormone .

Gibberalla fujikuroi.

Photosynthesis consists of two steps: 

(i) In photochemical phase or light reaction solar energy is trapped by chlorophyll and stored in the form of chemical energy of ATP and as reducing power in NADPH₂. Oxygen is involved in the light reaction by splitting of water (photolysis of water). 

(ii) Biosynthetic phase or dark reaction in which the reducing capacity of NADPH and the energy of ATP are utilized in the conversion of carbon dioxide to carbohydrates.

Carotene and Xanthophyll.

The hormones which promote growth are called growth promoters.

Example:

• Auxins
• Cytokinins.

Some plant hormones promote growth. So they are called growth promoters.