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 Biology Questions

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Q:

Atrophy is a condition that occurs when

A) muscle decreases in size and function because of disease or trauma B) carbon dioxide, lactic acid, and other wastes accumulate in the muscle
C) increased use of skeletal muscle causes an increase in its strength D) the tendons that attach muscle to bone become stretched or injured
 
Answer & Explanation Answer: A) muscle decreases in size and function because of disease or trauma

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:

Different forms of genes are called

A) Genomes B) Allele
C) Genotypes D) None of the above
 
Answer & Explanation Answer: B) Allele

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Q:

One function of sphincter muscles is to

A) secrete digestive juices into the GI tract B) grind large food particles
C) trigger hormone release D) control the passage of food through the GI tract
 
Answer & Explanation Answer: D) control the passage of food through the GI tract

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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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Q:

Gametes are produced by the process of

A) Mitosis B) Meiosis
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) Meiosis

Explanation:

A gametes are haploid cells as they have only one set of chromosomes. Meiosis is a process of cellular reproduction in which both male and female gametes are formed. During meiosis, the DNA is only replicated or copied one time.

Gametes_are_produced_by_the_process_of1560944987.png image

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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

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Q:

Where does protein synthesis take place?

A) Nucleus B) Ribosomes
C) On the cell wall D) All of the above
 
Answer & Explanation Answer: B) Ribosomes

Explanation:

Protein synthesis take place in the cytoplasm where ribosomes are located as they are the machinery which are responsible for the protein synthesis.

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