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 Biology Questions

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Q:

Which shows a correctly paired DNA molecule?

A) AT B) TC
C) AC D) TG
 
Answer & Explanation Answer: A) AT

Explanation:

The nucleotides that are present in DNA molecule are 4. They are Thymine (T), Guanine (G), Adenine (A) and Cytosine (C).

 

Here in this Adenine pairs with Thymine (A - T) and Cytosine pairs with Guanine (C - G).

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Q:

Damage to hearing is caused by sounds which exceed

A) 70 decibles B) 80 decibles
C) 100 decibles D) 120 decibles
 
Answer & Explanation Answer: D) 120 decibles

Explanation:

High frequency sound attacks the tympanic memberane and makes it defective. 120 decibles is too high a pitch to be heard and therefore it impairs the hearing ability.

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Q:

Conversion of Glycogen to Glucose is stimulated by

A) Insulin B) Cortisol
C) Glucagon D) Progesterone
 
Answer & Explanation Answer: C) Glucagon

Explanation:
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Q:

Which of these phosphorylates ADP to make ATP?

A) E B) B
C) C D) A
 
Answer & Explanation Answer: A) E

Explanation:

The ATP is synthesized from ADP and an inorganic phosphate and involves special channel proteins that are embedded in a membrane. ATP is formed in the electron transport chain of photosynthesis and cellular respiration.

 

which_of_these_phosphorylates_adp_to_make_atp1554270963.jpg image

 

Photosynthesis only occurs in autotrophic organisms while respiration occurs in all types of organisms.

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Q:

The organs protected by the thoracic cage include the

A) lungs B) heart
C) both a & b D) None of the above
 
Answer & Explanation Answer: C) both a & b

Explanation:

The organs protected by the thoracic cage include the lungs and the heart.

The_organs_protected_by_the_thoracic_cage_include_the1563453679.jpg image

 

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Q:

Where are genes located in the cell?

Answer

Genes are located on DNA present in the chromosome. Chromosomes are present in the nucleus of the cell.

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Q:

Which of the following serve as antibodies?

A) Proteins B) Lipids
C) Carbohydrates D) Nucleic acids
 
Answer & Explanation Answer: A) Proteins

Explanation:
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Q:

Which of the following is not a function of saliva?

A) contains fluoride to harden the tooth enamel B) moistens food and helps stick it together to make it easier to swallow
C) begins the chemical breakdown of starches D) helps clean the mouth
 
Answer & Explanation Answer: A) contains fluoride to harden the tooth enamel

Explanation:

Saliva is produced by the salivary gland which helps in food digestion.

 

Option A) contains fluoride to harden the tooth enamel is not the function of saliva.

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