Chap.2 Biological molecules MCQS

1.       

2. BIOLOGICAL MOLECULES

 

2.       

Those molecules which are present in the body of living organisms are called:

(a) Inorganic Compounds b) Organic Compounds

(c) Bio-Molecules        (d) Both a and c

C

3.       

The most abundant organic bio-molecule in a bacterial cell is:

(a) Carbohydrates        (c) Water

(c) Proteins                  (d) Nucleic Acids

C

4.       

The chemical composition of carbohydrate in mammalian cell is:

(a) More than bacterial cell

(b) Equal to bacterial cell

(c) Less than bacterial cell

(d) Carbohydrate are absent in bacteria

A

5.       

Which one is the type of reaction in which water is removed?

(a) Condensation         b) Hydrolysis

(c) Anabolism              (d) Botha and c

D

6.       

The functional group present in fructose is:

(a) Ketonic Group        (b) Aldehyde Group

(c) Carboxylic Group   (d) Hydroxyl Group

A

7.       

Which enzyme will catalyze the reaction when sucrose is converted into glucose and fructose?

(a) Cellulase                 (b) Sucrase

(c) Polymarase             (d) Hydrolase

B

8.       

Which of the following group is attached to the polymer which is present in the exoskeleton of arthropods?

(a) NH2                                    (b) Sulphur

(c) Calcium                  (d) COOH

A

9.       

If hydrogen bond is absent in water molecule then its boiling point will be:

(a) 80°C                       (b)-80°C

(C) 100°C                    (d)-100°C

B

10.   

 Sucrose is a:

(a) Monosaccharide     (b) Disaccharide

(c) Oligosaccharide      (d) Polysaccharide

B

11.   

Carbohydrates.component of nucleic acid is:

a.hexose                      b. pentose

(c) Heptose                  (d) Triose

B

12.   

A DNA template was found to contain 29% of adenine bases. The percent of Thymine will be:

(a) 58                           (b) 42

(c)21                            (d) 29

D

13.   

In DNA guanine is 10%. The content of Cytocine is:

(a) 80%                                    (b) 40%

(c) 71%                                    (d) 10%

D

14.   

Triose keto sugar is:

(a) Glyceraldehyde      (b) Dihydroxyacetone

c. fructose                    (d) Mannose

B

15.   

The most abundant disaccharide in nature is:

a) Sucrose                    (b) Maltose

(c) Lactose                   (d) None of these

A

16.   

Which of the following make more then 95% of human body by mass:

a) O, N and P               (b) C, H, and O

(c)C , H. and N                        (d) N, C. and O

B

17.   

The bond that makes back bone of organic compounds is:

(4)C-N bond                (b)C-C bond

(c)C-O bond                (d) All of these

B

18.   

What is the percentage of protein in dry mass

of cell (Prokaryotes)

(a) 50%                        (b) 15%

(c) 30%                        (d) 18%

D

19.   

Which compound/molecules has the same ratio

in mammalian as well as in bacterial cell:

(a) Water                      (b) Inorganic ion

(c) Organic compounds (d) All of these

D

20.   

The 2nd  most abundant organic compound in

protoplasm is:

(a) Proteins                  (b) Lipid

(c) Carbohydrates        (d) All of these these

C

21.   

If hydrogen bond is removed from water, the

freezing point of water will be:

(a) 0°C                         (b)-4°C

(c)-80°C                       (d)-100°C

D

22.   

The most abundant carbohydrate in nature is:

(a) Cellulose                (b) Starch

(c) Glycogen                (d) All of these

A

23.   

Which of the following carbohydrates has an

additional amino group attached to it:

(a) Chitin                     (b) Murien

(c) Glycoprotein          (d) Both a and b

A

24.   

How many peptide bonds are there in insulin

A)29                            B)49

C)50                            D)51

B

25.   

In sickle cell anemia which amino Acid is

replaced with valine?

(a) Glutamic acid         (b) Valine

(c) Glucine                   (d) Both a and b

A

26.   

Antibodies are specialized proteins, which

structural level do antibodies have:

(a) Primary                   (b) Secondary

(c) Tertiary                   (d) Quaternary

D

27.   

Human body breaks beta-carotene to

produce 2 molecules:

(a) Vitamin A               (b) Vitamin D

(c) Vitamin B2             (d) All of these

A

28.   

Which of the following Phytohormone is lipid

(a) Auxins                    (b) Gibberellins

(c) Cytokines               d) All of these

D

29.   

Glycolipids are important conjugating

molecules mainly present in:

(a) Brain                      (b) Plasma Membrane

(c) Liver                       (d) Both a and b

B

30.   

Which one of the following have methyl

group?

(a) Adenosine              (b) Guanine

(c) Thymine                 (d) Gytosine

B

31.   

All of the following are co-enzyme except:

(a) NAD                       (b) FAD

(c) NADP                     (d) ATP

C

32.   

Water in most heavy at:

(a) At 4 °C                   (b) Below 4 °C

(c) Above 4 °C                        (d) At all temperatures

D

33.   

Characteristics of monosaccharides are:

(a) Soluble in water     

(b) Sweet in taste

(c) Empirical formula is (CH2O)

(d) All of these

A

34.   

Monosaccharides consists of carbon

atoms

(a) 2-7                          (b) 100

(c) 200                         (d) 3-7

D

35.   

Which one of the following is pentose sugar?.

(a) Ribose Sugar          (b) Deoxyribose Sugar

(c) RUBP                     (d) All of these

D

36.   

Which one of the following is considered to be hexoses?

(a) Glucose                  (b) Fructose

(c) Galactose                (d) All of these

D

37.   

Which one of the following is the

example of disaccharide?

(a) Sucrose                   (b) Lactose

(c) Maltose                   (d) All of these

D

38.   

Lactose on hydrolysis give rise to:

(a) Glucose + Fructose

(b) Glucose + Galactose

(c) Glucose + Glucose

(d) Glyceraldehyde

B

39.   

Grapes contain as much as Glucose.

(a) 60%                                    (b) 70 %

(c) 80%                                    (d) 27 %

D

40.   

Which one of the following is aromatic R groups amino acids?

(a) Phenylalanine         (b) Tyrosine

(c) Tryptophan             (d) All of these

D

41.   

A chain with amino acids and three peptide bonds is called tripeptide.

(a) 4                 (b) 3

(c) 5                 (d) 6

A

42.   

Bodies of living organisms contain % of water.

(a) 20%                        (b) 50%

(c) 60%                        (d) 70% to 90%.

D

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