Biology Questions

Q:

Which of the following vitamin helps in clotting of blood?

A) Vitamin K B) Vitamin D
C) Vitamin B1 D) Vitamin B2
 
Answer & Explanation Answer: A) Vitamin K

Explanation:

Vitamin K helps in clotting of blood. It is used by the body to help blood clot.

 

Warfarin (Coumadin) is used to slow blood clotting. By helping the blood clot, vitamin K might decrease the effectiveness of warfarin (Coumadin).

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Q:

Which of these is not a function of the kidneys?

A) The kidneys regulate the plasma volume B) The kidneys help to regulate blood pressure
C) The kidneys help control the rate of red blood cell production D) The kidneys deactivate vitamin D and stimulate the activity of osteoclasts
 
Answer & Explanation Answer: D) The kidneys deactivate vitamin D and stimulate the activity of osteoclasts

Explanation:

The kidneys deactivate vitamin D and stimulate the activity of osteoclasts is wrong among the functions of kidneys.

 

The kidneys are two bean-shaped organs in the renal system. They help the body pass waste as urine. They also help filter blood before sending it back to the heart.

 

The kidneys perform many crucial functions, including:

  • maintaining overall fluid balance.
  • regulating and filtering minerals from the blood.
  • filtering waste materials from food, medications, and toxic substances.
  • creating hormones that help produce red blood cells, promote bone health, and regulate blood pressure.
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Q:

What is the shortest phase of the cell cycle?

A) M B) G1
C) S D) G2
 
Answer & Explanation Answer: A) M

Explanation:

Longest and shortest phases Of cell cycle:

Shortest Phase - M phase or Mitotic phase.

Longest phase - G1 phase of the Interphase

Longest and shortest phases During Mitosis:

Longest Phase - Prophase

Shortest Phase - Anaphase

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Q:

Maximum fixation of solar energy is done by

A) Fungi B) Protozoa
C) Bacteria D) Green plants
 
Answer & Explanation Answer: D) Green plants

Explanation:
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Q:

Branch of agriculture concerned with the production of crops

A) Agrotology B) Agronomy
C) Agrostology D) Anthropology
 
Answer & Explanation Answer: B) Agronomy

Explanation:
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Q:

Which of the following pairs is mismatched? 

A) Hooke - cell theory B) van Leeuwenhoek - germ theory
C) Lister - aseptic surgery D) Jenner - vaccines
 
Answer & Explanation Answer: B) van Leeuwenhoek - germ theory

Explanation:
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Q:

Shedding of leaves and fruits is due to the presence of hormone named

A) Indole - acetic acid B) Naphthalene acetic acid
C) Gibberellins D) Abscisic acid
 
Answer & Explanation Answer: D) Abscisic acid

Explanation:
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Q:

The correct order of events during meiosis is

A) prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II. B) anaphase I, telophase I, prophase I, cytokinesis, meiosis II.
C) cytokinesis, metaphase I, anaphase I, telophase I, D) telophase I, prophase I, cytokinesis, meiosis II, anaphase
 
Answer & Explanation Answer: A) prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II.

Explanation:

The correct order of events during meiosis is:

prophase I,

metaphase I,

anaphase I,

telophase I,

cytokinesis, and

meiosis II.

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