Biology Questions

Q:

Do plant cells have Mitochondria?

A) No B) Yes
C) May be D) Can't be determined
 
Answer & Explanation Answer: B) Yes

Explanation:

While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. Cellular respiration takes place in the mitochondria. They need mitochondria for this reason.
Hence with this logic, we can say that Plants cells have mitochondria.

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2 1901
Q:

At which stage in its life cycle does the silkworm yield the fiber of commercial use

A) Larva B) Egg
C) Pupa D) Imago
 
Answer & Explanation Answer: C) Pupa

Explanation:
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3 1901
Q:

Stress is a factor that contributes to heart disease risk.

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

Explanation:

True, poorly controlled stress and anger can lead to heart attacks and strokes.

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2 1898
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 1891
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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5 1878
Q:

Hypercalcemia can be caused by

A) malignancy B) hyper-parathyroidism
C) both A & B D) None of the above
 
Answer & Explanation Answer: C) both A & B

Explanation:

Hypercalcemia is a condition in which the calcium level in your blood is above normal. Too much calcium in your blood can weaken your bones, create kidney stones, and interfere with how your heart and brain work.

Hypercalcemia_can_be_caused_by1550553960.png image

Hypercalcemia is usually a result of overactive parathyroid glands.

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2 1876
Q:

Where does meiosis take place in bryophytes?

A) Capsule B) Protonema
C) Antheridia D) None of the above
 
Answer & Explanation Answer: A) Capsule

Explanation:

Meiosis takes in the capsule of the Bryophytes.

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1 1873
Q:

Which of the following defines a genome?

A) Every human cell B) the complete set of an organism's genes and other DNA sequences
C) the complete set of an organism's polypeptides D) a karyotype
 
Answer & Explanation Answer: B) the complete set of an organism's genes and other DNA sequences

Explanation:
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2 1871