Biology MCQs with Answer by General knowledge Solutions
Biology MCQs with Answer by General knowledge Solutions
1 .When
ATP forms AMP
- (A) Inorganic pyrophosphate is produced
- (B) Inorganic phosphorous is produced
- (C) Phsophagen is produced
- (D) No energy is produced
2.
Standard free energy (∆G°) of hydrolysis of ATP to ADP + Pi is
- (A) –49.3 KJ/mol
- (B) –4.93 KJ/mol
- (C) –30.5 KJ/mol
- (D) –20.9 KJ/mol
3.
Standard free energy (∆G°) of hydrolysis of ADP to AMP + Pi is
- (A) –43.3 KJ/mol
- (B) –30.5 KJ/mol
- (C) –27.6 KJ/mol
- (D) –15.9 KJ/mol
4.
Standard free energy (∆G°) of hydrolysis of phosphoenolpyruvate is
- (A) –61.9 KJ/mol
- (B) –43.1 KJ/mol
- (C) –14.2 KJ/mol
- (D) –9.2 KJ/mol
5.
Standard free energy (∆G°) of hydrolysis of creatine phosphate is
- (A) -–51.4 KJ/mol
- (B) –43.1 KJ/mol
- (C) –30.5 KJ/mol
- (D) –15.9 KJ/mol
6.
The oxidation-reduction system having the highest redox potential is
- (A) Ubiquinone ox/red
- (B) Fe3+ cytochrome a/Fe2+
- (C) Fe3+ cytochrome b/Fe2+
- (D) NAD+
7. If ∆G°= –2.3RT log Keq, the free energy
for the reaction will be A BC + 10moles 10moles 10moles
- (A) –4.6 RT
- (B) –2.3 RT
- (C) +2.3 RT
- (D) +4.6 RT
8.
Redox potential (EO volts) of NAD+/NADH is
- (A) –0.67
- (B) –0.32
- (C) –0.12
- (D) +0.03
9. Redox potential (EO volts) of
ubiquinone, ox/red system is
- (A) +0.03
- (B) +0.08
- (C) +0.10
- (D) +0.29
10. Redox potential (EO volts) of cytochrome
C, Fe3+/Fe2+ is
- (A) –0.29
- (B) –0.27
- (C) –0.08
- (D) +0.22
11.
The prosthetic group of aerobic dehydrogenases is
- (A) NAD
- (B) NADP
- (C) FAD
- (D) Pantothenic acid
12.
Alcohol dehydrogenase from liver contains
- (A) Sodium
- (B) Copper
- (C) Zinc
- (D) Magnesium
13. A molybdenum containing
oxidase is
- (A) Cytochrome oxidase
- (B) Xanthine oxidase
- (C) Glucose oxidase
- (D) L-Amino acid oxidase
14. A copper containing oxidase
is
- (A) Cytochrome oxidase
- (B) Flavin mononucleotide
- (C) Flavin adenine dinucleotide
- (D) Xanthine oxidase
15. The
mitochondrial superoxide dismutase contains
- (A) Mg++
- (B) Mn++
- (C) Co++
- (D) Zn++
16. Cytosolic superoxide
dismutase contains
- (A) Cu2+ and Zn2+
- (B) Mn2+
- (C) Mn2+ and Zn2+
- (D) Cu2+ and Fe2+
17. Cytochrome oxidase contains
- (A) Cu2+ and Zn2+
- (B) Cu2+ and Fe2+
- (C) Cu2+ and Mn2+
- (D) Cu2+
18. Characteristic absorption
bands exhibited by ferrocytochrome:
- (A) α band
- (B) β band
- (C) α and β bands
- (D) α, β and γ bands
19. Monooxygenases are found in
- (A) Cytosol
- (B) Nucleus
- (C) Mitochondira
- (D) Microsomes
20. A component of the
respiratory chain in mitochondria is
- (A) Coenzyme Q
- (B) Coenzyme A
- (C) Acetyl coenzyme
- (D) Coenzyme containing thiamin
21. The redox carriers are
grouped into respiratory chain complex
- (A) In the inner mitochondrial membrane
- (B) In mitochondiral matrix
- (C) On the outer mitochondrial membrane
- (D) On the inner surface of outer mitochondrial membrane
22. The sequence of the redox
carrier in respiratory chain is
- (A) NAD—FMN—Q—cyt b—cyt c1—cyt c—cyt aa3 → O2
- (B) FMN—Q—NAD—cyt b—cyt aa3—cyt c1— cyt c → O2
- (C) NAD—FMN—Q—cyt c1—cyt c—cyt b—cyt aa3 → O2
- (D) NAD—FMN—Q—cyt b—cyt aa3—cyt c—cyt c1 → O2
23. The correct sequence of
cytochrome carriers in respiratory chain is
- (A) Cyt b—cyt c—cyt c1—cyt aa3
- (B) Cyt aa3— cyt b—cyt c—cyt c1
- (C) Cyt b—cyt c1—cyt c—cyt aa3
- (D) Cyt b—cyt aa3—cyt c1— cyt c
24. Reducing equivalents from
pyruvate enter the mitochondrial respiratory chain at
- (A) FMN
- (B) NAD
- (C) Coenzyme Q
- (D) Cyt b
25. Reducing equivalents from
succinate enter the mitochondrial respiratory chain at
- (A) NAD
- (B) Coenzyme Q
- (C) FAD
- (D) Cyt c
26. The respiratory chain
complexes acting as proton pump are
- (A) I, II and III
- (B) I, II and IV
- (C) I, III and IV
- (D) I and II
27. If the reducing equivalents
enter from FAD in the respiratory chain, the phosphate.oxygen ration (P:O) is
- (A) 2
- (B) 1
- (C) 3
- (D) 4
28. If the reducing equivalents
enter from NAD in the respiratory chain, the phsphate/oxygen (P:O) is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
29. One of the site of phsosphorylation
in mitochondrial respiratory chain is
- (A) Between FMN and coenzyme Q
- (B) Between coenzyme Q and cyt b
- (C) Between cytochrome b and cytochrome c1
- (D) Between cytochrome c1 and cytochrome c
30. Rotenone inhibits the
respiratory chain at
- (A) FMN → coenzyme Q
- (B) NAD → FMN
- (C) Coenzyme Q → cyt b
- (D) Cyt b → Cyt c1
31. Activity of cytochrome
oxidase is inhibited by
- (A) Sulphite
- (B) Sulphate
- (C) Arsenite
- (D) Cyanide
32. Transfer of reducing
equivalents from succinate dehydrogenase to coenzyme Q is specifically
inhibited by
- (A) Carboxin
- (B) Oligomycin
- (C) Piericidin A
- (D) Rotenone
33. Chemiosmotic theory for
oxidative phosphorylation has been proposed by
- (A) Chance and Williams
- (B) Pauling and Corey
- (C) S. Waugh
- (D) P. Mitchell
34. The number of ATP produced in
the oxidation of 1 molecule of NADPH in oxidative phosphorylation is
- (A) Zero
- (B) 2
- (C) 3
- (D) 4
35. The coupling of oxidation and
phosphorylation in intact mitochondria:
- (A) Puromycin
- (B) Oligomycin
- (C) Streptomycin
- (D) Gentamycin
36. An uncoupler of oxidative
phosphorylation is
- (A) Carboxin
- (B) Atractyloside
- (C) Amobarbital
- (D) Dinitrocresol
37. The chemical inhibiting
oxidative phosphorylation, Adependent on the transport of adenine nucleotides
across the inner mitochondrial membrane is
- (A) Oligomycin
- (B) Atractyloside
- (C) Dinitrophenol
- (D) Pentachlorophenol
38. Porphyrins are synthesized in
- (A) Cytosol
- (B) Mitochondria
- (C) Cytosol and mitochondria
- (D) Rough endoplasmic reticulum
39. Heme is synthesized from
- (A) Succinyl-CoA and glycine
- (B) Active acetate and glycine
- (C) Active succinate and alanine
- (D) Active acetate and alanine
1. A 2. C 3. C 4. A 5. B 6. B 7. C 8. B 9. C 10. D 11. C 12.
C 13. B 14. A 15. B 16. A 17. B 18. D 19. D 20. A 21. A 22. A 23. C 24. B 25. C
26. C 27. A 28. C 29. C 30. A 31. D 32. A 33. D 34. A 35. B 36. D 37. B 38. C 39.
A
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