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Q:

Which best summarizes the concept of natural selection?

A) the fittest organisms survive and reproduce B) an organism will always adapt to its environment
C) an organism will always mutate to survive D) a mutation always makes a species fitter
 
Answer & Explanation Answer: A) the fittest organisms survive and reproduce

Explanation:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

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Q:

Why are yeast cells frequently used as hosts for cloning?

A) they are eukaryotic cells B) they do not have plasmids
C) only yeast cells allow the gene to be cloned D) they easily form colonies
 
Answer & Explanation Answer: A) they are eukaryotic cells

Explanation:

If you were to produce a protein in bacterial cloning systems, you would not get the same post transcriptional and post translational modifications because the prokaryotic and eukaryotic systems work differently on the modifications.

Thus human recombinant protein genes are usually cloned in yeast cells. Also since they have a short generation time, they can be easily culture.

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Q:

Which cells are destroyed in AIDS

A) Monocytes B) Neutrophils
C) Lymphocytes D) R.B.C.
 
Answer & Explanation Answer: C) Lymphocytes

Explanation:
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Q:

Important objective of biotechnology in agriculture section is _________

A) % produce best resistant varieties of plant B) % increase the nitrogen content
C) % decrease the seed number D) % increase the plant weight
 
Answer & Explanation Answer: A) % produce best resistant varieties of plant

Explanation:
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Q:

The artificial kidney is a

A) transplant B) machine
C) another's kidney D) other kidney from same body
 
Answer & Explanation Answer: B) machine

Explanation:

The artificial kidney is the dialysis machine. Blood from the body is fed into the machine which removes nitrogenous wastes like urea and returns the blood back to the body.People with renal failure have to use this machine.

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Q:

Who is known as father of medicine

A) Aristotle B) Theophrastus
C) Hippocrates D) Edward Jenner
 
Answer & Explanation Answer: C) Hippocrates

Explanation:
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Q:

In a bisexual flower if androcium and gynoecium mature at different time the phenomeon is known as _________

A) Dichogamy B) Herpogamy
C) Haterogamy monogamy D) None of these
 
Answer & Explanation Answer: A) Dichogamy

Explanation:
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Q:

Which of the following is not correct concerning nerves?

A) Axons make up a majority of the matter in a nerve. B) Nerves are collection of axons of either sensory or motor neurons but not both.
C) Nerves are covered by an outer sheath called the epineurium D) Nerves consist of parallel bundles of myelinated and nonmyelinated axons.
 
Answer & Explanation Answer: A) Axons make up a majority of the matter in a nerve.

Explanation:

Axons make up a majority of the matter in a nerve is the one statement regarding nerves is incorrect.

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