Biology Chapter 3 Entry test MCQs
26. The simplest monosaccharide containing keto group is:
a. Dibydroxyacetone
b. Glyceraldehyde
c. Ribose
d. Glucose
27. The compounds which, on hydrolysis, yield polyhydroxy aldehyde or ketone subunits are:
a. Proteins
b. Lipids
c. Carbohydrates
d. Polynucleotides
28. Which of the following type of carbohydrates has high molecular weight and in sparingly soluble in water?
a. Disaccharides
b. Monosaccharide
c. Polysaccharides
d. Oligosaccharides
29. Glycosidic bond is formed by the:
a. Addition of oxygen
b. Removal of water
c. Addition of water
d. Removal of oxygen
30. Starch is present in tuber, fruits and grains but absent in animal cells. Instead animals have a substance stored in liver and muscles known as:
a. Glycogen
b. Glucose
c. Glucagon
d. Galactose
31. The covalent bond or bridge between two monosaccharides to form a disaccharide is called a:
a. Hydroxyl bond
b. Carboxyl bond
c. Glycosidic bond
d. Hydrogen bond
32. Which is an example of a disaccharide?
a. Glycogen
b. Lactose
c. Fructose
d. Starch
33. ………… is stored in animal cells.
a. Sucrose
b. Starch
c. Glycogen
d. Cellulose
34. The bond that is formed between two monosaccharide units is called:
a. Peptide bond
b. Ionic bond
c. Glycosidic bond
d. Hydrogen bond
35. Pure form of cellulose is:
a. Cellophane
b. Cotton
c. Paper
d. Chitin
36. The best example of polysaccharide which is stored in animals is called:
a. Sucrose
b. Lactose
c. Glycogen
d. Cellulose
37. C5H10O4 is the formula of
a. DNA
b. Deoxyribose sugar
c. ATP
d. RNA
38. ………… is the storage form of carbohydrates in animals and humans which is
equivalent to the……………. in plants.
a. Starch, glycogen
b. Glycogen, cellulose
c. Glycogen, starch
d. Starch, cellulose
39. Monosaccharides have a general formula represented by:
a. C(H₂O)n
b. Cn(H2O)n
c. C1(H2O)n
d. C2(H₂O)n
40. ………..are the major sites for the storage of glycogen in an animal’s body.
a. Around thighs and belly
b. Muscle and liver
c. Liver and kidneys
d. Around belly and hips
41. Chitin is a:
a. Glycoprotein
b. Lipoprotein
c. Phospholipid
d. Polysaccharide
42. Which of the following are instant source of energy in living organisms, like glucose Their general formula is:
a. Cx(H2O)x
b. Cx(H₂O)y
c. Cx(HO)y
d. CxH12O6
43. All are characteristics of monosaccharides except:
a. Primary product of photosynthesis
b. All carbon contain OH except carbonyl carbon
c. Very simple and very sweet in taste
d. Digestion by amylase enzyme
44. Which of the followings sugars is/are component of nucleic acid?
a. Pentoses
b. Tetroses
c. Hexoses
d. Trioses
Proteins
45. How many types of amino acids are present in the cell?
a. 20
b. 170
c. 3000
d. 25
46. A globular protein consisting of more than one polypeptide chains has:
a. Secondary structure
b. Primary structure
c. Quaternary structure
d. Tertiary structure
47. A protein having secondary structure possesses:
a. Hydrogen bonding
b. Peptide bond
c. Disulfide bond
d. Both A and B
48. All of the following are examples of fibrous proteins except:
a. Keratin
b. Silk fiber
c. Fibrin
d. Myoglobin
49. Which of the following is a complex of globular protein with non-proteinaceous material?
a. Albumin
b. Collagen
c. Haemoglobin
d. Fibrinogen
50. Muscle haemoglobin possesses:
a. Secondary structure
b. Primary structure
c. Quaternary structure
d. Tertiary structure