Home Knowledge 50 Botany Important MCQ that you Should memorize | Part 3

50 Botany Important MCQ that you Should memorize | Part 3

by Naz khaliq
botany important MCQ
botany important MCQ

This is the 3rd part of Biology, Science and Botany important MCQ that you should memorize to do better in Job tests and interviews. Botany important MCQ with answers are below. Moreover, check the first two parts which consist of important Botany questions with answers.

These Botany important Mcq are with answers that will help you to memorize them better.

1: What is the Chief source of energy on Earth?

a) Coal

b) Sun

c) Moon

d) Natural gas

Answer: Sun

2) The type of energy released by break down of chemical bonds of organic substances and capable of performing different works is:

a) Chemical energy

b) Kinetic energy

c) Potential energy

d) Mechanical energy

Answer: Kinetic energy

3) Energy changes in nature are of types:

a) Energy transfer

b) Potential energy

c) Mechanical energy

d) none of these

Answer: Mechanical energy

4) The stored energy which is not capable of doing work instantly is:

a) Kinetic energy

b) Potential energy

c) Mechanical energy

d) None of these

Answer: Potential energy

5) A Molecule of ATP is structurally similar to a molecule of :

a) Deoxyribonucleoride

b) Ribonucleotide

c) Protein

d) None of these

Answer: Ribonucleotide

6) The functioning of ATP was first discovered by:

a) Lohmann

b) Lipman

c) Clasius

d) Gibbs

Answer: Lipman

7: The branch dealing with transformation and use of energy by living cells is called:

a) Thermodynamics

b) Bioenergetics

c) Energetics

d) Entropy

Answer: Bioenergetics

8: Who is called the Father of the ATP cycle?

a) Clasius

b) Lohmann

c) Lipmann

d) Gibbs

Answer: Lipmann

9: A number of fundamental laws of thermodynamics are:

a) 1

b) 2

c) 3

d) 4

Answer: 2

10: The total amount of energy in the universe remains constant representing:

a) The first law of thermodynamics

b) the second law of thermodynamics

c) Both (A) and (b)

d) None of these

Answer: The first law of thermodynamics

11: Energy transfer through movement and collision of particles results in:

a) Decrease in entropy

b) Increase in entropy

c) No change in entropy

d) None of these

Answer: Increase in entropy

12: A thermodynamic property that is used to measure the degree of randomness or disorder of a system is :

a) Enthalpy

b) Entropy

c) Free energy

d) Redox potential

Answer: Entropy

13: The term entropy was first used by:

a) J.W Gibbs

b) R.Clasius

c) Lipmann

d) McMunn

Answer: R.Clasius

14: A system which has a continuous influx of energy directly or indirectly is called

a) closed system

b) Open system

c) Both (a) and (b)

d) None of these

Answer: Open system

15: Which system is in a steady state or homeostasis?

a) Open system

b) Closed system

c) Both (a) and (b)

d) None of these

Answer: Open system

16) For the occurrence of any process in the universe, there is:

a) Decrease in free energy and increase in entropy

b) Increase in free energy and decrease in entropy

c) Decrease in both free energy and entropy

d) Increase in both free energy and entropy

Answer: Decrease in free energy and increase in entropy

17: The combined concept of two laws of thermodynamics was given by:

a) R.Clasius

b) J.W.Gibbs

c) Lipmann

d) None of them

Answer: J.W.Gibbs

18: Thermodynamically favourable reactions are called:

a) Exogonic reactions

b) Endergonic reactions

c) Both (a) and (b)

d) None of these

Answer: Exogenic reactions

19: Respirations is an example of :

a) Exergonic reaction

b) Endergonic reaction

c) Thermodynamically unfavourable reactions

d) None of the above

Answer: Exergonic reaction

20: Which of the following acts as a bridge between exergonic and endergonic reactions of cells?

a) ATP

b) NADH2

c) ADP

d) AMP

Answer: ATP

21: Which of the following is not an energy carrier in a cell?

a) ATP

b) Creatine phosphate

c) GTP

d) Flavoproteins

Answer: Flavoproteins

22: How many high-energy bonds (pyrophosphate bonds) are present in a molecule of ADP?

a) 1

b) 2

3) 3

4) 4

Answer: 1

23: In the hydrolysis of ATP to ADP, the standard free energy change is:

a) -3.4 kcal/mol

b) -7.3 kcal/mol

c) -aa.5 kcal/mol

d) +7.3 kcal/mol

Answer: -7.3 Kcal/mol

24: In ATP molecule, the sugar present in

a) Ribose

b) Deoxyribose

c) Glucose

d) Xylose

Answer: Ribose

25: The energy currency of a cell is:

a) AMP

b) ADP

c) ATP

d) GTP

Answer: ATP

26: ATP of a cell is mainly stored in:

a) Cytosol

b) Mitochondria

c) Chloroplast

d) Nucleus

Answer: Mitochondria

27: Which of the electron carriers in the respiratory chain is not a prosthetic group associated with proteins?

a) Cytochrome

b) Ubiquinone

c) Flavoprotein

d) NAD

Answer: Ubiquinone

28: Cytochromes were discovered by:

a) D.Keilin

b) McMunn

c) Lipmann

d) Lohmaan

Answer: MCMunn

29: Which of the electron carriers is ubiquitous in nature?

a) COQ

b) Cytochromes

c) Flavoproteins

d) Fe-S Proteins

Answer: COQ

30: Which of the following electron carriers acts in sequence to carry electrons from ubiquinone to molecular O2?

a) NADH dehydrogenase

b) Iron-sulphur proteins

c) Cytochromes

d) None of these

Answer: Cytochromes

31: How many structural complexes of electron carriers occur on the inner mitochondrial membrane?

a) 1

b) 2

c) 3

d) 4

Answer: 4

32: Which of the electron carriers in the respiratory chain is capable of accepting and donating only a single electron?

a) Flavoproteins

b) Ubiquinone

c) Cytochromes

d) Iron-sulphur proteins

Answer: Iron-sulphur proteins

33: Genes act by producing enzymes, which was first advocated by:

a) Beadle and Tatum

b) Hans Krebs

c) J.W Gibbs

d) H.G. Khorana

Answer: Beadle and Tatum

34: Which of the following is not a high-energy compound?

a) ATP

b) GTP

c) Creatine Phosphate

d) AMP

Answer: AMP

35: Ribozyme differed from enzyme in:

a) Do not catalyze metabolic processes

b) Do not occur inside the cell

c) Are not proteins in nature

d) All of these

Answer: Are not protein in nature

36: Catabolic processes are:

a) Exergonic

b) Endergonic

c) Indpendent of energy

d) None of the these

Answer: Exergonic

37: During the formation of ATP from ADP, the source of phosphate is:

a) ATP

b) ADP

c) Glucose-PO4

d) Inorganic phosphate (IP)

Answer: Inorganic phosphate

38: ATP is:

a) Hormone

b) Protein

c) High energy phosphate compound

d) Reducing enzyme

Answer: High energy phosphate compound

39: For cell movements, chemical energy is changed into:

a) Mechanical energy

b) Electrical energy

c) Thermal energy

d) Light energy

Answer: Mechanical energy

40: Cytochromes occur in:

a) Mitochondria

b) Chloroplast

c) Both a and b

d) None of these

Answer: Both a and b

41: Cytochromes in plant cells function mainly as:

a) O2 acceptor

b) CO2 acceptor

c) Electron acceptor

d) H2O acceptor

Answer: Electron acceptor

42: How many cytochromes are involved in the electron transport chain?

a) Two

b) Four

c) Five

d) Six

Answer: Five

43: Which of the following is related to vitamin B2?


b) NAD


d) None of these

Answer: FMN/FAD

44: Cytochrome has:

a) Magnesium

b) Manganese

c) Copper

d) Iron

Answer: Iron

45: The high energy bonds of ATP are between:

a) C-C

b) C-O

c) C-N

d) O-P

Answer: O-P

46: The maintenance of internal favourable conditions by a self-regulated mechanism, in spite of the fact that there are changes in the environment, is known as:

a) Entropy

b) Enthalpy

c) Steady state

d) Homeostasis

Answer: Homeostasis

47: The bond formed between the first phosphate group and adenosine in ATP is:

a) Nitrophosphate bond

b) Adenophosphate bond

c) Phosphoanhybride bond

d) Phosphoester bond

Answer: Phosphoester bond

48: In the process of respiration, the potential energy stored in organic compounds is released in the form of:

a) Physical energy

b) Radiant energy

c) Kinetic energy

d) Chemical energy

Answer: Chemical energy

49: ATP molecules combine with carrier molecules and flow:

a) Along the concentration gradient

b) Against the concentration gradient

c) Both (a) and (b)

d) None of the above

Answer: Against the concentration gradient

50: Which yields ATP during the contraction of muscles?

a) Myoglobin

b) Creatine phosphate

c) Haemoglobin

d) Myosin

Answer: Creatine phosphate

These are the Botany important questions with answers. Keep checking the page for more important Botany questions.

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