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:

Find the next number in te given series ?

5, 25, 61, 113, ...

A) 142	B) 181
C) 156	D) 179

Answer & Explanation Answer: B) 181

Explanation:

Here the series follow the rule that

$1^{2} + 2^{2} = 5$

$3^{2} + 4^{2} = 25$

$5^{2} + 6^{2} = 61$

$7^{2} + 8^{2} = 113$

SO NEXT IS, $9^{2} + 10^{2} = 181$

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Q:

If the following five names which name will come in the last in a telephone directory ?

a) Mahinder b) Mahender c) Mahindra d) Mahendra e) Mohinder

A) Mahinder	B) Mahindra
C) Mohinder	D) Mahender

Answer & Explanation Answer: C) Mohinder

Explanation:

The given names will be arranged in the alphabetical order as : Mahender, Mahendra, Mahinder, Mahindra, Mohinder. Clearly, 'Mohinder' comes last.

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Q:

What is the rate of interest p.c.p.a.?

I. An amount doubles itself in 5 years on simple interest.

II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400.

III. Simple interest earned per annum is Rs. 2000

A) I only	B) II and III only
C) All I, II and III	D) I only or II and III only

Answer & Explanation Answer: D) I only or II and III only

Explanation:

$I . \frac{P * R * 5}{100} = P \Leftrightarrow R = 20$

$I I . P {(1 + \frac{R}{100})}^{2} - P - \frac{P * R * 2}{100} = 400 = > p R^{2} = 4000000$

$I I I . \frac{P * R * 1}{100} = 2000 = > P R = 200000$

$\frac{P R^{2}}{P R} = \frac{4000000}{200000} \Leftrightarrow R = 20$

Thus I only or (II and III) give answer.

Correct answer is (D)

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Q:

Choose the word which gives similar meaning to the given word from the following options.

'Autopsy'

A) Diagnosis	B) Rebuild
C) Manufacture	D) Postmortem

Answer & Explanation Answer: D) Postmortem

Explanation:

Autopsy is the medical term for postmortem.

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Q:

At what rate percent per annum will a sum of money double in 8 years.

A) 12.5%	B) 13.5%
C) 11.5%	D) 14.5%

Answer & Explanation Answer: A) 12.5%

Explanation:

Let principal = P, Then, S.I.= P and Time = 8 years

We know that S.I. = PTR/100

Rate = [(100 x P)/ (P x 8)]% = 12.5% per annum.

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Q:

A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: C) 3

Explanation:

Area of the park = (60 x 40) = 2400 $m^{2}$

Area of the lawn = 2109 $m^{2}$

Area of the crossroads = (2400 - 2109) = 291 $m^{2}$

Let the width of the road be x metres. Then,

$60 x + 40 x - X^{2} = 291$

$x^{2} - 100 x + 291 = 0$

(x - 97)(x - 3) = 0
x = 3.

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Q:

Silver Mirror test is given by which one of the following compounds?

1. Benzophenone

2. Acetaldehyde

3. Acetone

4. Formaldehyde

A) Only 1	B) Only 2
C) 1 and 3	D) 2 and 4

Answer & Explanation Answer: D) 2 and 4

Explanation:

Both Formaldehyde and Acetaldehyde will give this test

$H C H O \overset{[A g (N H_{3})_{2}^{+}]}{\to} \overset{A g}{S i l v e r m i r r o r} + O r g a n i c c o m p o u n d$

$C H_{3} - C H O \overset{[A g (N H_{3})_{2}^{+}]}{\to} \underset{S i l v e r m i r r o r}{A g} + O r g a n i c c o m p o u n d$

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