1250+ Interesting Biology Questions Answers MCQ

Q:

Which step happens first in DNA replication?

A) Initiation	B) Elongation
C) Termination	D) None of the above

Answer & Explanation Answer: A) Initiation

Explanation:

In the first step of DNA replication called initiation, the DNA pair gets unwidened.

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Q:

When does DNA replication happen?

A) S - phase	B) M - Phase
C) Prophase	D) Anaphase

Answer & Explanation Answer: A) S - phase

Explanation:

DNA is replicated during the S-Phase in the interphase of a cell.

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Q:

Body cells that respond to insulin include

A) Liver cells	B) Endothelial cells
C) Skin cells	D) Bone cells

Answer & Explanation Answer: A) Liver cells

Explanation:

Body cells that respond to insulin include liver cells and many other cells in the human body.

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Q:

Lysogeny can result in all of the following except

A) Acquisition of new characteristics by the host cell	B) Transduction of specific genes
C) Immunity to reinfection by the same phage.	D) Immunity to reinfection by any phage

Answer & Explanation Answer: D) Immunity to reinfection by any phage

Explanation:

Lysogeny can result in all of the following except Immunity to reinfection by any phage. Lysogeny means phage DNA is incorporated in Host cell DNA.

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Q:

Nematodes and arthropods both

A) are suspension feeders	B) have ciliated larvae
C) develop an anus from the blastopore (pore) formed in the gastrula stage	D) grow by shedding their exoskeleton

Answer & Explanation Answer: D) grow by shedding their exoskeleton

Explanation:

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Q:

Meiosis ii is similar to mitosis in that

A) the daughter cells are diploid	B) sister chromatids separate during anaphase
C) DNA replicates before the division	D) All of the above

Answer & Explanation Answer: C) DNA replicates before the division

Explanation:

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Q:

Which part of flower produces pollen grains that are generally yellowish in color?

A) Sepals	B) Petals
C) Stamens	D) Carpels

Answer & Explanation Answer: C) Stamens

Explanation:

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Q:

Photosynthesis takes place in the presence of chlorophyll and _________.

A) water	B) nutrients
C) carbon-dioxide	D) sunlight

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