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Q:

The hardest part of the body is ______.

A) Bones B) Tooth Enamel
C) Skull D) Spinal Cord
 
Answer & Explanation Answer: B) Tooth Enamel

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Q:

Which type of pathogen causes the water­borne disease Hepatitis­A?

A) Parasitic B) Viral
C) Protozoan D) Bacterial
 
Answer & Explanation Answer: B) Viral

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Q:

Meibomian glands are located in

A) Eye B) Ear
C) Nose D) Skin
 
Answer & Explanation Answer: A) Eye

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Q:

Polynucleotide chain of DNA contains

A) a nitrogenous base, deoxyribose sugar and phosphate group B) a nitrogenous base, ribose sugar and phosphate group
C) deoxyribose sugar, ribose sugar and phosphate group D) a nitrogenous base and phosphate group only
 
Answer & Explanation Answer: A) a nitrogenous base, deoxyribose sugar and phosphate group

Explanation:

The two DNA strands are called polynucleotidesbecause they are composed of simpler monomer units called nucleotides. Eachnucleotideis composed of one of four nitrogen-containingnucleobases (cytosine, guanine, adenine or thymine), a sugar called deoxyribose, and a phosphate group.

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Q:

Which gland secretes bile, a digestive fluid?

A) pancreas B) liver
C) thyroid D) testes
 
Answer & Explanation Answer: B) liver

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Q:

Which of the following is an excretory organ of cockroach?

A) Malphigian Tubules B) Nephridia
C) Coxal Gland D) Green Gland
 
Answer & Explanation Answer: A) Malphigian Tubules

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Q:

Blood leaving the liver and moving towards the heart has a higher concentration of _____ .

A) Lipids B) Urea
C) Bile Pigments D) Carbon dioxide
 
Answer & Explanation Answer: C) Bile Pigments

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Q:

__________ is the interaction in which one species benefits and the other is neither harmed nor benefited.

A) Predation B) Commensalism
C) Competition D) Parasitism
 
Answer & Explanation Answer: B) Commensalism

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