Sawaal

 Biology Questions

Popular Latest Rated
Q:

13 - Chambered heart occurs in

A) Leech B) Earthworm
C) Snail D) Cockroach
 
Answer & Explanation Answer: D) Cockroach

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology

376 28658
Q:

The corner of the cells of collenchyma tissue in plant are thickened due to deposition of _____

A) Lignin and suberin B) Suberin and cutin
C) Cellulose and pectin D) Chitin and lignin
 
Answer & Explanation Answer: C) Cellulose and pectin

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology

284 28064
Q:

The phenomenon of summer sleep by animals is called

A) hibernation B) aestivation
C) laziness D) lethargy
 
Answer & Explanation Answer: B) aestivation

Explanation:

Aestivation is summer sleep. Many organisms like the snails do not find it comfortable in summer. They withdraw and lead a life with reduced BMR (basic Metabolic Rate) in a state of  dormancy.

Report Error

View Answer Report Error Discuss

Filed Under: Biology

300 24552
Q:

The plasma of the blood contains which among the following constituents?

I. Proteins

II. Salts

III. Hormones

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology

4 23662
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:
Report Error

View Answer Report Error Discuss

Filed Under: Biology

210 21891
Q:

Name the blood cells in which nucleus is absent

A) Lymphocytes B) Blood Platelets
C) Monocytes D) Eosinophils
 
Answer & Explanation Answer: B) Blood Platelets

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Biology

237 21117
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.

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: Bank Exams

4 20585
Q:

Hardest Part of the Human Body?

A) Tooth Enamel B) Femur
C) Temporal bone of skull D) Knee bone
 
Answer & Explanation Answer: A) Tooth Enamel

Explanation:

Tooth Enamel is the hardest and most highly mineralized substance in the human body. It is a tissue and not a bone. This tissue has high mineral content which makes it hardest substance.

 

Femur and Temporal bone of the skull are the hardest bones of the human body.

Report Error

View Answer Report Error Discuss

Filed Under: Biology
Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO

96 19527