Q:

Which best describes the structure of a DNA molecule?

A) A double helix	B) A strand of nucleic acids
C) A single strand of amino acids	D) A sugar ring

Answer & Explanation Answer: A) A double helix

Explanation:

DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group.

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Q:

Which type of weathering creates karst topography?

A) Chemical	B) Physical
C) Both A & B	D) None of the above

Answer & Explanation Answer: A) Chemical

Explanation:

Karst topography is created by the chemical weathering of the rocks such as limestone, dolomite etc...

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Q:

Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water

A) Magnesium	B) Calcium
C) Manganese	D) Chromium

Answer & Explanation Answer: C) Manganese

Explanation:

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Q:

Improve the bracketed part of the sentence.
Father (would have been appreciated) your efforts if you had informed him.

A) would be appreciated	B) would have appreciated
C) should have been appreciated	D) No improvement

Answer & Explanation Answer: B) would have appreciated

Explanation:

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Q:

Nationalistic composers expressed their nationalism by

A) songs on dances	B) songs on people
C) songs on peasant life	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

Nationalistic composers expressed their nationalism by basing songs on dances or people, folklore, peasant life, operas, symphonic poems.

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Q:

Which of the following is a World Bank group of five institutions

A) IMF	B) IDA
C) ILO	D) ITU

Answer & Explanation Answer: B) IDA

Explanation:

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Q:

Landowners often complain that hunters

A) do not get written permission to hunt	B) make too much noise
C) leave litter behind	D) All of the above

Answer & Explanation Answer: A) do not get written permission to hunt

Explanation:

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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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