Questions

Q:

Which of the following occurred in the presence of tetrodotoxin?

A) The number of action potentials decreased. B) The size of the action potential increased.
C) The number of action potentials increased. D) The size of the action potential decreased.
 
Answer & Explanation Answer: A) The number of action potentials decreased.

Explanation:
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Filed Under: Biology
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Q:

The given sentences, when properly sequenced, form a coherent paragraph. Each sentence is labelled with a letter. Choose the most logical order of the sentences from among the five given choices to construct a coherent paragraph keeping 1 as the first statement.

1) On one online forum, the sysadmins were enjoying some gallows humour.

A) They were discussing a pair of recently announced security flaws, known as Meltdown and Spectre that between them affect any computer powered by processors designed by Intel, AMD, ARM and others.

B) Another wrote, with tongue only half in cheek, that “computers were a mistake”.

C) One simply posted a picture of a fire raging in a skip.

D) That’s most of them, in other words, from smartphones and desktop PCs to games consoles and the racks of machines that run cloud-computing services from Microsoft, Amazon and the like.

A) CBAD B) ADBC
C) BCDA D) CADB
 
Answer & Explanation Answer: A) CBAD

Explanation:

The correct sequence is CBAD.

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Q:

Which Indian city has been ranked the world's second most densely populated city with 31,700 people per sq km, by the World Economic Forum (WEF) citing UN Habitat Data  ?

A) Mumbai B) New Delhi
C) Kolkata D) Hyderabad
 
Answer & Explanation Answer: A) Mumbai

Explanation:

Mumbai has been ranked the world's second most densely populated city with 31,700 people per sq km, by the World Economic Forum (WEF) citing UN Habitat Data. Bangladesh's capital Dhaka topped the list with 44,500 people per sq km. Rajasthan's Kota has been ranked the world's seventh most densely populated city with 12,100 people per sq km.

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Q:

Improve the bracketed part of the sentence.

 

One minute they're all sweet (but) caring and the next minute they stab you in the back.

 

A) if B) and
C) only D) nor
 
Answer & Explanation Answer: B) and

Explanation:
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Q:

Unlike Mitosis, Meiosis results in the formation of

A) 2N daughter cells B) Haploid cells
C) body cells D) Diploid cells
 
Answer & Explanation Answer: B) Haploid cells

Explanation:

Unlike Mitosis, Meiosis results in the formation of 4 Genetically different cells.

 

Meiosis results in the formation of 4 Haploid daughter cells from one Diploid parent cell.

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Q:

Man has _____ pairs of salivary glands

A) 3 B) 4
C) 6 D) 8
 
Answer & Explanation Answer: A) 3

Explanation:

Salivary glands of man are  3 pairs = 6. They are one pair of parotid glands, one pair of sub-maxillary or sub-mandibular glands and one pair of sub-lingual glands.

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Filed Under: Biology

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Q:

Which of the following is NOT a waste material removed from blood in the kidney?

 

A) Ammonia B) Carbon dioxide
C) Urea D) Uric acid
 
Answer & Explanation Answer: B) Carbon dioxide

Explanation:
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Filed Under: Chemistry
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Q:

What are the sides of the dna ladder made of

A) nitrates and sugars B) sugars and hydrates
C) sugars and phosphates D) phosphates and nitrates
 
Answer & Explanation Answer: C) sugars and phosphates

Explanation:

DNA is a double-stranded molecule twisted into a helix. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.

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