Biology Questions

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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1 1944
Q:

Which one of the following statements about lymph is correct?

A) Lymph is formed due to leakage of blood through capillaries. B) Lymph contains blood cells such as RBC.
C) Lymph is also circulated by the blood circulating heart. D) Lymph only transports hormones.
 
Answer & Explanation Answer: C) Lymph is also circulated by the blood circulating heart.

Explanation:

The lymphatic system is a complex system of fluid drainage and transport, and immune response and disease resistance. Fluid that is forced out of the bloodstream during normal circulation is filtered through lymph nodes to remove bacteria, abnormal cells and other matter. This fluid is then transported back into the bloodstream via the lymph vessels. Lymph only moves in one direction, toward the heart.

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1 1944
Q:

Marasmus usually is associated with a deficiency of

A) Vitamins B) Calories
C) Proteins D) Fats
 
Answer & Explanation Answer: B) Calories

Explanation:

Marasmus usually is associated with a deficiency of Calories.

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3 1943
Q:

Which stage of cellular respiration produces the most ATP?

A) Glycolysis B) Kreb's cycle
C) Electron transport chain D) All the above
 
Answer & Explanation Answer: C) Electron transport chain

Explanation:

There are 3 stages in cellular respiration. They are:

1. Glycolysis

2. Kreb's cycle

3. Electron transport chain

 

Here, Glycolysis produces only 2 ATP whereas Kreb's cycle produces no ATP. Electron transport chain of the cellular respiration produces the maximum ATP.

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0 1940
Q:

Deficiency of which minerals causes goiter?

A) Magnesium B) Calcium
C) Iodine D) Sulphur
 
Answer & Explanation Answer: C) Iodine

Explanation:

Deficiency of Iodine cause Goiter also called Enlarged Thyroid. It doesn't give any pain but difficult to swallow and breath are its causes.

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13 1940
Q:

Which of the following is considered a modified stem?

A) Tendril B) Taproot
C) Petiole D) Tuber
 
Answer & Explanation Answer: D) Tuber

Explanation:

Tuber is considered as a modified stem. These type of stems carry out special functions that are important for the plant to survive. Tubers serves as a food reserve and bearing buds wherein new plants can grow.

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3 1939
Q:

Bacteria divide by

A) Binary Fission B) Spirilla
C) RNA D) Fusion
 
Answer & Explanation Answer: A) Binary Fission

Explanation:

Bacteria divided and reproduce by Binary fission. In this process, the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two replicates.

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3 1933
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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3 1930