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Q:

If $x + \frac{1}{x} = - 2,$ then the value of $x^{7} + \frac{1}{x^{7}}$

A) 1	B) -1
C) 0	D) -2

Answer & Explanation Answer: D) -2

Explanation:

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Filed Under: Square Roots and Cube Roots
Exam Prep: Bank Exams

Q:

Biological catalysts are protein molecules which

1. speed up a chemical reaction

2. remain unchanged after reaction

3. function optimally at 37 deg C.

4. do not have an enzymatic activity

Select the correct answer using the code given below.

A) 1 only	B) 1, 2 and 3
C) 2 and 3 only	D) 1, 3 and 4

Answer & Explanation Answer: B) 1, 2 and 3

Explanation:

Enzymes are biological catalysts. Enzymes are the catalysts involved in biological chemical reactions.

A fundamental task of proteins is to act as enzymes—catalysts that increase the rate of virtually all the chemical reactions within cells.

A catalyst remains chemically unchanged itself at the end of a reaction.

Each enzyme has a temperature that it works optimally in, which in humans is around 98.6 degrees Fahrenheit, 37 degrees Celsius –the normal body temperature for humans.

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Filed Under: Biology
Exam Prep: Bank Exams

Q:

Which of the following cells do not contain nucleus?

1. Root hair cells

2. Red blood cells

3. Platelets

4. Monocytes

Select the correct answer using the code given below.

A) 1 only	B) 2 and 3 only
C) 1, 2 and 4	D) 2, 3 and 4

Answer & Explanation Answer: B) 2 and 3 only

Explanation:

The absence of a nucleus is an adaptation of the red blood cell for its role. It allows the red bloodcell to contain more haemoglobin and, therefore, carry more oxygen moleculesLike red cells, platelets (thrombocytes) have no nucleus.Monocytes have a small spherical nucleus and has abundant dark staining condensed chromatin.There are 5 organelles found in a root hair cell. They are the: nucleus, cytoplasm, cell membrane, cell wall and vacuole.

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Filed Under: Biology
Exam Prep: Bank Exams

Q:

Simplify the equation $\frac{{(0.73)}^{3} + {(0.27)}^{3}}{{(0.73)}^{2} + {(0.27)}^{2} - (0.73) \times (0.27)}$

A) 1	B) 0.4087
C) 0.73	D) 0.27

Answer & Explanation Answer: A) 1

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

Q:

The time for a train of length 110 metres running at the speed of 72 km/hr to cross a bridge of length 132 metres is

A) 9.8 sec	B) 12.1 sec
C) 12.42 sec	D) 14.3 sec

Answer & Explanation Answer: B) 12.1 sec

Explanation:

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Filed Under: Problems on Trains
Exam Prep: Bank Exams

Q:

Which one of the following hormones is essential for the uptake of glucose by cells in the human body?

A) GH	B) TSH
C) Insulin	D) Cortisol

Answer & Explanation Answer: C) Insulin

Explanation:

Insulin is an anabolic hormone that stimulates glucose and fatty acid uptake into adipose cells, promoting triglyceride synthesis.Glucagon is a peptide hormone, produced by alpha cells of the pancreas. It works to raise the concentration of glucose and fatty acids in the bloodstream, and is considered to be the main catabolic hormone of the body.

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Filed Under: Biology
Exam Prep: Bank Exams

Q:

In a school there are 1500 students, 44% of them are girls. Monthly fee of each boy is 540 and fee of each girl is 25% less than that of a boy. The sum of fees of boys & girl is

A) Rs. 720600	B) Rs. 720800
C) Rs. 720900	D) Rs. 721000

Answer & Explanation Answer: C) Rs. 720900

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

Q:

Which one of the following statements is not correct?

A) The response of the ear to sound of increasing intensity is approximately logarithmic.	B) The sensitivity of the human ear does not vary with the frequency of the sound.
C) When two or more waves traverse the same medium, the displacement of any element of the medium is the algebraic sum of the displacements due to each wave.	D) Longitudinal waves can travel in all media-solids, liquids and gases.

Answer & Explanation Answer: B) The sensitivity of the human ear does not vary with the frequency of the sound.

Explanation:

The human ear can respond to minute pressure variations inthe air if they are in the audible frequency range, roughly 20 Hz -20 kHz. In fact, tests conducted show an increased sensitivity in the 3000 Hz range which is the optimal amplification frequency in the human ear. So, the sensitivity of the human ear varies with the frequency of the sound.

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Filed Under: Physics
Exam Prep: Bank Exams

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