Biology Questions

Q:

Which phrase best describes rough ER?

A) studded with ribosomes B) fewer solutes than the cell
C) stored in the central vacuole D) protected by vesicles
 
Answer & Explanation Answer: A) studded with ribosomes

Explanation:
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Q:

Which best describes Genes?

A) long, double chains of nucleic acids. B) long, single chains of amino acids.
C) long, single chains of nucleic acids. D) long, double chains of amino acids.
 
Answer & Explanation Answer: A) long, double chains of nucleic acids.

Explanation:

Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity.

 

As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.

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Q:

The notable hardness of bone is attributed to

A) the presence of inorganic hydroxyapatites B) the presence of glycoproteins
C) the presence of collagen fibers D) the presence of cartilage
 
Answer & Explanation Answer: A) the presence of inorganic hydroxyapatites

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:

A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?

A) 2 B) 3
C) 4 D) 5
 
Answer & Explanation Answer: B) 3

Explanation:

There are 3 double-layered membrane layers, which the protein has to pass to reach its destination.

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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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Q:

Which among the following blood protein regulates the amount of water in plasma?

A) Albumin B) Fibulin
C) Globulin D) Fibrin
 
Answer & Explanation Answer: A) Albumin

Explanation:

The blood protein Albumin regulates the amount of water in plasma.

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Q:

Oxygenated blood flows through which vessel?

A) Pulmonary Veins B) Pulmonary Arteries
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Pulmonary Veins

Explanation:

The oxygenated blood  flows through pulmonary veins then leaves the lungs, which return it to the left heart, completing the pulmonary cycle.

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