11
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:   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.

Subject: Biology
Exam Prep: Bank Exams
Q:

The story of vitamins dates back to

A) 15th century B) 16th century
C) 17th century D) 18th century
 
Answer & Explanation Answer: D) 18th century

Explanation:
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Filed Under: Biology

16 5732
Q:

Bone deformities occur due to the excess intake of

A) Phosphorus B) Potassium
C) Fatty acid D) Fluorine
 
Answer & Explanation Answer: D) Fluorine

Explanation:
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Filed Under: Biology

210 22687
Q:

Deficiency of 'Thiamine'

A) Beri-Beri B) Pellagra
C) Anaemia D) Rickets
 
Answer & Explanation Answer: A) Beri-Beri

Explanation:
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17 5452
Q:

Vitamins are

A) Macro Nutrients B) Micro nutrients
C) Essential Amino acids D) Non essential Amino acids
 
Answer & Explanation Answer: B) Micro nutrients

Explanation:
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29 6948
Q:

The Vitamin that is destroyed on heating

A) E B) C
C) A D) B
 
Answer & Explanation Answer: B) C

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Filed Under: Biology

15 4800