Exams Questions and Answers

Q:

Sort each description by the type of RNA it describes?

a) contains an anticodon
b) specifies the amino acid squence for a protein
c) contains exons
d) has amino acids covalently attached
e) is a component of ribosomes
f) is the most abundant form of RNA

A) a, b, d - tRNA, c - mRNA, e, f - rRNA	B) a, c - tRNA, b, d - mRNA, e, f - rRNA
C) a, e, f - rRNA, b - mRNA, c, d - tRNA	D) None of the above

Answer & Explanation Answer: A) a, b, d - tRNA, c - mRNA, e, f - rRNA

Explanation:

Option A)

a, b, d - tRNA, c - mRNA, e, f - rRNA

Is the given sorted description that describes the RNA type.

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Q:

What is the value of $(6 x^{2} - 5 y^{2}) (6 x^{2} + 5 y^{2}), if x = \frac{1}{\sqrt{3}} and y = \frac{1}{\sqrt{5}}$ ?

A) 2	B) 3
C) 4	D) 5

Answer & Explanation Answer: B) 3

Explanation:

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Q:

An element with an atomic number of ___ will form a basic oxide.

A) 20	B) 7
C) 6	D) 17

Answer & Explanation Answer: A) 20

Explanation:

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Q:

From the following pairs, find the one which is correctly matched?

A) Scurvy- Thiamine	B) Tuberculosis- ATS
C) Tetanus- BCG	D) Malaria- Chloroquine

Answer & Explanation Answer: D) Malaria- Chloroquine

Explanation:

Chloroquine is a medication used to prevent and to treat malaria.

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Q:

Select the synonym of

bristle

A) thorn	B) tranquil
C) friction	D) sleek

Answer & Explanation Answer: A) thorn

Explanation:

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Q:

Select the antonym of

snag

A) hurdle	B) boon
C) bug	D) glitch

Answer & Explanation Answer: B) boon

Explanation:

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Q:

Choose the word which is nearly opposite in meaning to the given word:-

Acrimonious

A) Legal	B) Severe
C) Cursive	D) Harmonious

Answer & Explanation Answer: D) Harmonious

Explanation:

Acrimonious means angry (typically of speech or discussion)Legal means relating to lawSevere means extremeCursive means written with the letters joinedHarmonious means sweet-soundingwhichis nearly opposite meaning to Acrimonious

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Q:

$Mg + O_{2} = MgO$

Balance the above Chemical equation?

A) 2Mg + O2 ----> 2MgO	B) 2Mg + O ----> 2MgO
C) 2Mg + O ----> MgO2	D) 2Mg + O2 ----> MgO2

Answer & Explanation Answer: A) 2Mg + O2 ----> 2MgO

Explanation:

Given Equation is

$Mg + O_{2} \to MgO$

Balancing the Chemical Equation is nothing but Conservation of Matter. As Matter is Neither created nor Destroyed, it must be conserved.

Here we have 1 Mg and 2 O on the left side and 1 Mg and 1 O on the right side

To balance that, add 1 Mg on the left side so that it becomes 2 Mg and 2 O on the left side

i.e,

$2 Mg + O_{2} \to 2 MgO$

Here it has 2 Mg & 2 O on the left side and 2 Mg and 2 O on the right side and the Chemical equation is Balanced.

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