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Q:

Which helps prevent errors in DNA replication?

A) Complementary base pairing reduce errors B) DNA ligase checks the DNA for errors
C) DNA is located in the ribosomes D) Any base can pair with any other base

Answer:   A) Complementary base pairing reduce errors



Explanation:

DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the basis for biological inheritance. Complementary base pairing helps prevent errors in DNA replication.

Subject: Biology
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Q:

Oxygenated blood flows through which vessel?

A) Pulmonary Veins B) Pulmonary Arteries
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Pulmonary Veins

Explanation:

The oxygenated blood  flows through pulmonary veins then leaves the lungs, which return it to the left heart, completing the pulmonary cycle.

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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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Q:

Deep fried foods are carcinogenic because they are rich in

A) Nicotine B) Hydrocarbons
C) Fats D) All of the above
 
Answer & Explanation Answer: C) Fats

Explanation:

Deep fried foods are carcinogenic because they are rich in fats.

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Q:

Veins seen in the leaves, serve the function of

A) Transpiration B) Photosynthesis
C) Storage D) Conduction
 
Answer & Explanation Answer: A) Transpiration

Explanation:

Veins seen in the leaves, serve the function of Transpiration.

Related image

Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. 

 

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Q:

Where does protein synthesis take place in a cell?

A) Ribosomes B) Mitochondria
C) Cytoplasm D) Nucleus
 
Answer & Explanation Answer: A) Ribosomes

Explanation:

The protein synthesis take place in a cell outside the nucleus in the structures called ribosomes. Ribosomes link amino acids together in the order specified by messenger RNA molecules.

Where_does_protein_synthesis_take_place_in_a_cell1563603813.png image

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Q:

Which part of the brain is responsible for consciousness?

A) Brain stem B) Cerebrum
C) Cerebellum D) None of the above
 
Answer & Explanation Answer: B) Cerebrum

Explanation:

The brain has three main parts the cerebrum, cerebellum and brainstem. As cerebrum is the largest part of the brain it is divided into two hemispheres i.e, right and left. It performs many functions like vision, hearing, touch, learning, consciousness, emotions, etc...

which_part_of_the_brain_is_responsible_for_consciousness1563518225.png image

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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:

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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