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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 type of epithelium is removed with a buccal swab?

Answer

The stratified squamous epithelial cells or the outer layer of epidermis is removed with a buccal swab.

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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:

Which type of pathogen causes the water­borne disease Cholera?

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

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Q:

The embryo gets nutrition from the mother's blood with the help of a special tissue called

A) Uterus B) Placenta
C) Cervix D) Fallopian tube
 
Answer & Explanation Answer: B) Placenta

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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:

Algal bloom results from

A) Global warming B) Salination
C) Eutrophication D) Biomagnification
 
Answer & Explanation Answer: C) Eutrophication

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Q:

Proteins are polymers formed from

A) carbohydrates B) amino acids
C) nucleic acids D) lipids
 
Answer & Explanation Answer: B) amino acids

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