Explore topic-wise InterviewSolutions in .

1. True 

2. True 

3. False 

4. True

1. It cause toxicity to plants and affect the uptake and utilisation of macronutrients 

2. Boron 

3. Macronutrients – Excess 10 millimole /kilogram of dry matter Micronutrients – Less than 10 millimole /kilogram of dry matter

1. Zn 

2. B 

3. Mn 

4. Mo

• N, P, K, Mg 
• Chlorosis – N, K, Mg, S, Fe, Mn, etc. 
• Necrosis – K, Mg, Ca and Cu Delay flowering – N, S, and Mo

Increase the fertility of the soil. Biological N₂ fixation.

Boron: Pollen germination/ pollen tube growth

• Macro – N, P 
• Micro-Boron, copper

1. Ammonification 

2. Leghemoglobin

1. Leghemoglobin 

2. Pink-colored

Leghemoglobin is an oxygen scavenger. It creates anaerobic condition for the action of nitrogenase enzyme to fix N₂

1. Hydroponics 

2. uses 

• Used as kitchen garden, 
• Used to study deficiency symptoms

Excess of the micronutrient -Mn causes Toxicity because it prevent the uptake of Iron, Magnesium, and calcium. This results in deficiency symptom.

Leghemoglobin which is the scavenger of O₂ . Nitrogenase enzyme needs oxygen-free condition.

It acts as O₂ scavenger that means it helps in preventing the combining of O₂ with nitrogenase.

1. A – iv 

2. B – i 

3. C – iii 

4. D – ii 

5. E – v

Because it increases the fertility of soil (enrich N₂ content) for next year rice cultivation

Answer (A) Acrosome

(a) Resins are used in the preparation of varnishes. 

(b) The latex of Hevea braziliensis is used to prepare commercial rubber.

Answer (a) Cotton

Cotton bollworms, sugarcane borers are Major pest.

Electric current flows in two ways as an alternating current (AC) or direct current (DC). In alternating current, current keeps switching directions periodically – forward and backward. While in the direct current it flows in a single direction steadily. The main difference between AC and DC lies in the direction in which the electrons flow. In DC, the electrons flow steadily in a single direction while electrons keep switching directions, going forward and then backwards in AC.

(c) The number of atoms of each constituent are conserved in a chemical reaction. 

(b) carbon dioxide 

(a) volumetric analysis of the dry products of combustion 

(d) Non Ionic Detergent

If sodium stearate and polyethylene glycol reacts, then non-ionic detergents are formed

Correct option is (a) CH₃

CI (g) + CH₄ (g) → CH₃ (g) + HCI (g)

• Be is used in the manufacture of alloys. Cu-Be alloys are used in the preparation of high strength springs.
• Mg is used to prepare alloys with Al, Zn, Mn and Sn.
• Ca is used in the extraction of metals from their oxide.
• Radium salt are used in radiotherapy.

We know that -

One mole of CO₂ = 44 g CO₂ = molar mass of CO₂

∴ mass of CO₂ in 5 moles = 5 x 44 g

= 220 g . CO₂

Hence, 5 moles CO₂ contains 220 g of CO₂.

We know that P = mv

where P = momentum

m = mass

v = velocity

Given v = 4 x 10⁴ m/s

dm/dt = 1500 kg/s

We have,

F = dP/dt

F = v(dm/dt) (∵ P = mv)

F = 4 x 10⁴ x 1500

F = 6000 x 10⁴

F = 6 x 10⁷ N

Molar mass of NaClO = 74.5 g

Atomic mass of chlorine = 35.5 g/mol

∵ 1 mole of NaClO molecule contains = 1 mole of Cl atom

∴ 74.5 g of NaClO contains = 35.5 g, Cl atom

∴ Percentage composition of chlorine = 35.5/74.5 x 100

= 47.65%

Hence, percentage composition of chlorine in NaClO will be 47.65%.

Fusion of male gametes with secondary nucleus is called  Triple fusion.

Operon model is proposed by Jacob and Monad.

The driving force for an ecosystem is  Solar energy.

A strong acid or a strong base completely ionizes (dissociates) in a solution. In water, one mole of a strong acid HA dissolves yielding one mole of H+ (as hydronium ion H₃O⁺) and one mole of the conjugate base, A⁻. Essentially, none of the non-ionized acid HA remains.

The part of a molecular spectrum in which the bands arise from quantized changes in the energy of mutual atomic vibrations within the molecule — compare rotational spectrum.

Some medicines obtained from microorganisms are applied to kill or stop the growth of disease causing microorganisms. Such medicines are called antibiotics.

An antibiotic is a chemical substance that inhibits the growth of bacteria. They hinder the reproductive cycle of the bacteria inside the body of the host.

Correct option: (4) Cornea consists of dense matrix of collagen and is the most sensitive portion the eye.

Explanation: 

Cornea consists of dense matrix of collagen and corneal epithelium. It is the most sensitive part of eye.

Azadirachtin is found in Neem.

Antonie  van Leeuwenhoek was a 17^th century Dutch scientist. He is best known for discovering protozoa, and creating more than 500 simple microscopes. Van Leeuwenhoek was the first scientist to closely observe cells under a microscope. One of his most groundbreaking dicoveries was also one of his first. His observations, in 1674, of scummy pond water, led to the first visual descriptions and illustrations of such common organisms as the algae spirogyra. This contributed towards the foundation of several branches of biology. He made one of the first recorded observations of bacteria when he studied the plaque from his teeth. He noticed what he called ‘animalcules’ in the saliva sample. These animalcules were actually bacteria.  He gava cells their name because he thought they resembled the shape of a monk’s quarters. Although Van Leeuwenhoek never received any formal scientific training, he is considered to br the father of microbiology for his contributions to that field of science.