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Chemical Basis of Life Online Exam Quiz

Important questions about Chemical Basis of Life. Chemical Basis of Life MCQ questions with answers. Chemical Basis of Life exam questions and answers for students and interviews.

How many mass extinctions have been documented in fossil history?

Options

A : a. 2

B : b. 3

C : c. 4

D : d. 5

Mycorrhizae is scientific name for which of following?

Options

A : a. root fungi

B : b. cone bearing plants

C : c. flowering plants

D : d. underground roots

How many million years ago did synapsids exist?

Options

A : a. 300

B : b. 30

C : c. 900

D : d. 1000

How many million years ago did early cynodonts exist?

Options

A : a. 100

B : b. 200

C : c. 260

D : d. 300

Inner membranes of mitochondria have transport systems similar to those of

Options

A : a. archaea

B : b. prokaryotes

C : c. eukaryotes

D : d. viruses

Which of following was longest eon?

Options

A : a. Phanerozoic eon

B : b. hadean

C : c. Archaean

D : d. Proterozoic

Cell in which an endosymbiont life is called

Options

A : a. host cell

B : b. hold cell

C : c. control cell

D : d. replicative cell

In each mass extinction, what is average percentage of marine animals that went extinct?

Options

A : a. 10

B : b. 20

C : c. 40

D : d. 50

What is rate of movement of continents per year?

Options

A : a. few mm per year

B : b. few cm per year

C : c. few meters per year

D : d. 1 km/year

For how many billion years first three eons lasted?

Options

A : a. 1

B : b. 2

C : c. 3

D : d. 4

For how many million years origin of earth is to be estimated?

Options

A : a. 100

B : b. 3000

C : c. 2000

D : d. 4600

Drifting apart of continents due to movements in mantle is called

Options

A : a. continental shifting

B : b. mantle drift

C : c. crust drift

D : d. continental drift

Continents are part of earth crust that float over which of following?

Options

A : a. igneous rock

B : b. mantle

C : c. core

D : d. lava

Which of following plants are referred to as gymnosperms?

Options

A : a. cone bearing

B : b. flowering

C : c. underground

D : d. spiky

Which of following is richest source of fossils?

Options

A : a. sedimentary rock

B : b. igneous rock

C : c. alluvial soil

D : d. river bed

For which of following canine teeth are used?

Options

A : a. grinding

B : b. tearing

C : c. crushing

D : d. piercing

Which of following plants are referred to as angiosperms?

Options

A : a. spiky

B : b. cone bearing

C : c. flowering

D : d. underground

Humans belong in which of following eons?

Options

A : a. hadean

B : b. Archaean

C : c. Proterozoic

D : d. Phanerozoic eon

What are last billion years on earth called?

Options

A : a. Phanerozoic eon

B : b. hadean

C : c. Archaean

D : d. Proterozoic

What are RNA catalysts called?

Options

A : a. RNAse

B : b. RNA initiator

C : c. RNA polymerase

D : d. ribozymes

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