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 Biology Questions

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Q:

Which is a homologous chromosome pair?

A) Tetrad B) Gamate
C) Chromatid D) Zygote
 
Answer & Explanation Answer: A) Tetrad

Explanation:

Tetrad is a homologous chromosome pair in the given options. A homologous chromosome pair is a pair of chromosomes one from father and one from mother that has same gene sequence after the process of meiosis.

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1 2004
Q:

Activation of the receptors by stimuli is called

A) Adaptation B) Perception
C) Habituation D) Sensation
 
Answer & Explanation Answer: D) Sensation

Explanation:

Sensation is the activation of the receptors by stimuli.

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3 2003
Q:

The light reactions of photosynthesis supply the calvin cycle with

A) CO2and ATP B) ATP and NADPH
C) light energy D) H2O and NADPH
 
Answer & Explanation Answer: B) ATP and NADPH

Explanation:

The light reactions of photosynthesis supply the calvin cycle with ATP and NADPH.

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3 2001
Q:

Which of the following statements about DNA replication is false?

A) The enzyme that catalyzes DNA replication is DNA polymerase. B) Unwinding of the DNA molecule occurs as hydrogen bonds break.
C) The process is known as semiconservative replication because one old strand is conserved in the new molecule. D) Replication occurs as each base is paired with another exactly like it.
 
Answer & Explanation Answer: D) Replication occurs as each base is paired with another exactly like it.

Explanation:
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Filed Under: Biology
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2 1999
Q:

Biological membranes are composed of

A) Phospholipids B) Proteins
C) Carbohydrate groups D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Biological membranes are composed of phospholipids, Proteins and Carbohydrate groups attached to lipids and proteins.

 

Biological_membranes_are_composed_of1559036778.jpg image

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Filed Under: Biology
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1 1996
Q:

Skin is an example of what type of tissue?

A) epithelial B) connective
C) nervous D) All of the above
 
Answer & Explanation Answer: A) epithelial

Explanation:

Epithelial tissue is made of layers of cells that cover the surfaces of the body that come into contact with the exterior world, line internal cavities, and form glands.

 

The four types of tissue in the body are epithelial, connective, muscle, and nervous. 

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0 1992
Q:

Which of the following vitamins is synthesized by intestinal bacteria?

A) Vitamin B B) Vitamin A
C) Vitamin D D) Vitamin K
 
Answer & Explanation Answer: D) Vitamin K

Explanation:

Most of the Vitamin K is synthesized by intestinal bacteria in the large intestine.

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3 1992
Q:

When the diaphragm and external intercostal muscles contract,

A) the volume of the thorax decreases. B) the volume of the lungs decreases.
C) the volume of the thorax increases. D) the lungs shrink.
 
Answer & Explanation Answer: C) the volume of the thorax increases.

Explanation:
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Filed Under: Biology
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3 1989