Which of the following statements regarding fats is true?

• Arachidonic acid has 20 carbons excluding the carboxyl carbon.

• Glycerol is a trihydroxy propane.

• Palmitic acid has 18 carbons including the carboxyl carbon.

• Oils have higher melting points than fats.

• Oils have higher melting points than fats.

Coenzymes NAD and NADP contain the vitamins

• Niacin

• Biotin

• Thiamine

• Vitamin B₁₂

• Vitamin B₁₂

Choose the wrong statement

• Cells swell in hypertonic solutions and shrink in hypotonic solutions

• Water potential is the kinetic energy of water which helps in the movement of water

• The absorption of water by seeds and dry wood takes place by a special type of diffusion called imbibition

• Solute potential or PS is always negative

• Solute potential or PS is always negative

4.

When one element is involved in opening and closing of stomata, the other helps to maintain the ribosome  structure. They are

• Potassium and calcium

• Phosphorus and sulphur

• Potassium and magnesium

• Iron and magnesium

• Iron and magnesium

Which of the following groups of minerals are micronutrients?

• Magnesium, Manganese, Copper, Boron and Phosphorus

• Manganese, Copper, Magnesium, Zinc and Boron

• Nitrogen, Potassium, Manganese, Copper and Iron

• Iron, Manganese, Copper, Molybdenum and Zinc

• Iron, Manganese, Copper, Molybdenum and Zinc

Match the mineral in Column I with the enzyme activated in
Column II and choose the correct option.

Column I	Column II
(A) Magnesium	(1) Alcohol dehydrogenase
(B) Molybdenum	(2) Phosphoenolpyruvate carboxylase
(C) Zinc	(3) Nitrogenase

• A - 2; B - 3; C - 1

• A - 1; B - 2; C - 3

• A - 2; B - 1; C - 3

• A - 3; B - 2; C - 1

• A - 3; B - 2; C - 1

Which of the following statements regarding cyclic flow of electrons during light reactions is false?

• This process takes place in the stromal lamella

• ATP synthesis takes place

• NADPH + H⁺ is synthesized

• Takes place only when light of wavelength beyond 680 nm is available for excitation

• Takes place only when light of wavelength beyond 680 nm is available for excitation

In which of the following steps of citric acid cycle, CO₂ is evolved?

I. Citric acid – Ketoglutaric acid 

II. Succinic acid – Malic acid 

III. Malic acid – Oxaloacetic acid 

IV. $\mathrm{\alpha }$-ketoglutaric acid – Succinyl CoA

• I and II only

• I and IV only

• II and III only

• II and IV only

• II and IV only

Find out the mismatched pair

• C₄ plants - Kranz anatomy

• Primary CO₂ fixation product of C₄ plants - OAA

• Primary CO₂ acceptor of C₃  plants - RuBP

• Calvin pathway of C₄ plants occur in  - Bundle sheath 

• Calvin pathway of C₄ plants occur in  - Bundle sheath 

Which of these is/are not a property of facilitated transport?

(A) Requires special membrane proteins 

(B) Highly selective 

(C) Uphill transport 

(D) Requires ATP energy

• (A) and (B) only

• (C) and (D) only

• (A) and (C) only

• (B) and (C) only

• (B) and (C) only