Biology Questions

Q:

The HIV retrovirus is particularly deadly because

A) I can become AIDS shortly afte being contracted B) It attacks the body immune system
C) Treatments can be dangerous for patients D) Its hard to diagnose accurately
 
Answer & Explanation Answer: B) It attacks the body immune system

Explanation:

HIV is a virus that damages the immune system. HIV is a lifelong condition, and without treatment, a person with HIV can develop AIDS.

The_HIV_retrovirus_is_particularly_deadly_because1563452540.jpg image

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9 2073
Q:

Which is not a function of the cytoskeleton?

A) helps the cell move B) gives cell a shape
C) prevents chromosomes from separating D) None of the above
 
Answer & Explanation Answer: C) prevents chromosomes from separating

Explanation:

A cytoskeleton acts as a frame that gives a cell its shape, protects it to an extent, and helps with cellular motion.

 

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4 2072
Q:

The two purines in DNA are

A) Adenine & Thymine B) Thymine & Uracil
C) Guanine & Uracil D) Adenine & Guanine
 
Answer & Explanation Answer: D) Adenine & Guanine

Explanation:

The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.

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3 2072
Q:

Where is the genetic information of the cell stored?

A) DNA B) Cell membrane
C) Nucleus D) None of the above
 
Answer & Explanation Answer: C) Nucleus

Explanation:

The genetic information of the cell is DNA and is stored in the nucleus of the cell.

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2 2067
Q:

Which among the following is/are female hormones?
(i) Estrogen
(ii) Progesterone
(iii) Testosterone

A) (i) and (iii) B) (i) and (ii)
C) (ii) and (iii) D) Only (iii)
 
Answer & Explanation Answer: B) (i) and (ii)

Explanation:
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5 2067
Q:

Which of the following is a feature of ghrelin?

A) It stimulates appetite and energy storage B) It is released in high amounts from adipocytes during periods of excess energy intake
C) The blood level in the fasting state correlates directly with body weight D) It is a metabolic antagonist of leptin
 
Answer & Explanation Answer: A) It stimulates appetite and energy storage

Explanation:
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1 2062
Q:

Which of the following is part of the axial skeleton?

A) Thigh bone B) Shoulder bones
C) Vertebral column D) Foot bones
 
Answer & Explanation Answer: C) Vertebral column

Explanation:

The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. In the human skeleton, it consists of 80 bones and is composed of six parts; the skull bones, the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.

 

Bones of shoulder, thigh and foot are the part of appendicular skeleton. 

  

Hence, Vertebral column is the part of axial skeleton.

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3 2060
Q:

Which activity is accomplished using the genetic code?

A) mutation B) DNA can be made into mRNA
C) DNA formation D) None of the above
 
Answer & Explanation Answer: B) DNA can be made into mRNA

Explanation:
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