Biology Questions

Q:

In ovaries, the final products of meiosis are

A) haploid gametes B) diploid gametes
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) haploid gametes

Explanation:
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Q:

Organisms that feed on the excreta of other organisms are called 

A) autotrophs B) heterotrophs
C) coprophagous D) saprotrophs
 
Answer & Explanation Answer: C) coprophagous

Explanation:

The word coprodaeum refers to the last part of the elimentary canal.The excreta (undigested, matter) comes out of that part. So, the organisms that take in such materials are called coprophagous.

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Q:

Which statement regarding the mammalian heart is correct?

A) Blood is pumped from the heart via the atria. B) Oxygen-loaded blood moves only through the right side of the heart.
C) When the right atrium contracts, it forces blood into the left atrium. D) In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.
 
Answer & Explanation Answer: D) In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.

Explanation:

In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs is correct regarding mammalian heart.

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Q:

Meiosis starts with a single diploid cell and produces 4 haploid cells.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

A cell undergo meiosis, and it produces 4 haploid cells from a single diploid cell.


 


Hence, the given statement is true.

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Q:

Where does protein synthesis take place in a cell?

A) Ribosomes B) Mitochondria
C) Cytoplasm D) Nucleus
 
Answer & Explanation Answer: A) Ribosomes

Explanation:

The protein synthesis take place in a cell outside the nucleus in the structures called ribosomes. Ribosomes link amino acids together in the order specified by messenger RNA molecules.

Where_does_protein_synthesis_take_place_in_a_cell1563603813.png image

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Q:

Bone strength in later life depends on

A) the formation of dense bones during youth B) the increased calcium absorption in the elderly
C) the increased production of estrogen after menopause D) reducing physical activity to protect bones
 
Answer & Explanation Answer: A) the formation of dense bones during youth

Explanation:
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Q:

What are the three parts of the Nucleotide?

Answer

Nucleotides are the building blocks of the DNA and RNA used as genetic material. Nucleotides also are used for cell signaling and to transport energy throughout cells.


Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts::


1. Nitrogenous Base
2. Pentose Sugar
3. Phosphate Group.

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Q:

Closely stacked flattened sacs (plants only)

A) Vacuoles B) Lysosomes
C) Golgi apparatus D) None of the above
 
Answer & Explanation Answer: C) Golgi apparatus

Explanation:
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