Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

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.


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2.

Coenzymes NAD and NADP contain the vitamins

  • Niacin

  • Biotin

  • Thiamine

  • Vitamin B12

  • Vitamin B12


A.

Niacin

The common name of Niacin or Nicotinic acid is Vitamin-PP (Pellagra Preventive). It acts as coenzymes in hydrogen transport as NAD/Coenzyme-I and NADP/Coenzyme-II.


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3.

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


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5.

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


6.

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


7.

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


8.

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

I. Citric acid – Ketoglutaric acid 

II. Succinic acid – Malic acid 

III. Malic acid – Oxaloacetic acid 

IV. α-ketoglutaric acid – Succinyl CoA

  • I and II only

  • I and IV only

  • II and III only

  • II and IV only

  • II and IV only


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9.

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 


10.

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


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