Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Question on Molecular Evolution

1. The age of earth is estimate to be about
a)10000 years old
b)4-5 billion years ago
c)600 million year old
d)10-20

2. Which one of the following are Archaebacteria?
a)Actinomycetes
b)Pseudomonas
c)Rickettisae
d)Methanogens

3.Formation of most amino acids as well as adenine and other nucleic acid bases from inorganic molecules was experimentally shown by
Urey Miller experiment - MCQ on Molecular Evolution

a) Hugo de vries
b) Urey and Miller
c) Oparin and Haldane

d)Pasteur

4. The most primitive extant eukaryotes belong to the genus
a)plasmodium
b)tetrahymena
c)chlamydomonas
d)Giardia

5. Cambrian Explosion refers to
a) Origin of life
b)Origin of phyla
c) Origin of man
d)extinction of Dinosaurs

6. Which of the following statement cannot be support the endosymbiotic theory for the orgin of mitochondria?
a)Mitochondria DNA has a circular genome
b)mitochondrial ribosomes are inactivated by the antibiotic chloramphenicol
c)mitochondrial genes code for enzymes of oxidative respiration
d)mitochondrial ribosomes are 70s

7. Aerobic respiration is thought to have first appeared in some organisms of approximate age
a)1.0-1.5bp
b) 2.0-2.5bp
c)3.0-3.5bp
d)3.5-4.0bp

8. Which of the following process offers the greatest opportunities for accelerating the evolution of new useful proteins?
a)exon shuffling
b)intron excisions
c)transposons insertions
d)DNA amplification

9. The correct chronological sequences of geological times is
a) Devonian, Carboniferous, Cretaceous, Eocene
b) Eocene, Devonian, Carboniferous, Cretaceous
c) Devonian, Carboniferous, Eocene ,Cretaceous
d) Carboniferous, Devonian, Cretaceous, Eocene

10. The extant bacterial group that is most closely related to the ancestor from which mitochondria evolved is
a)purple photosynthetic bacteria
b)archaebacteria
c)cyanobacteia
d)methanogens

Learn more: MCQ on Zoology (Animal Science)
Answers:
1. b)4-5 billion years ago
2. d)Methanogens
3. b) Urey and Miller
4. d)Giardia
5.b) Origin of phyla
6. c)mitochondrial genes code for enzymes of oxidative respiration
7. b) 2.0-2.5bp
8.a)exon shuffling
9. a) Devonian, Carboniferous, Cretaceous, Eocene
10.a)purple photosynthetic bacteria

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