Structure of disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.

  • 'a' carbon of glucose and 'a' carbon of fructose

  • 'a' carbon of glucose and 'e' carbon of fructose

  • 'a' carbon of glucose and 'b' carbon of fructose

  • 'f' carbon of glucose and 'f' carbon of fructose

Out of the 3 given structure, the correct statement regarding bond present between C1 and C4 and C1 and C6 is -

  

  • (i) is between C1 and C4, (ii) and (iii) are between C1 and C6

  • (i) and (ii) are between C1 and C4, (iii) is between C1 and C6
  • (i) and (iii) are between C1and C4, (ii) is between C1 and C6
  • (i) and (iii) are between C1 and C6, (ii) is between C1 and C4

Sucrose is a : 
a. Monosaccharide
b. Disaccharide
c. Reducing sugar
d. Non-reducing sugar
Choose the correct option : 

  • (a, b)
  • (b, c)
  • (c, d)
  • (b, d)

Examples of globular proteins are :
a. Insulin
b. Keratin
c. Albumin
d. Myosin
Choose the correct option : 

  • (a, b)
  • (b, c)
  • (c, d)
  • (a, c)

Assertion: β-Glycosidic linkage is present in maltose.

Reason: Maltose is composed of two glucose units in which C- 1 of one glucose unit is linked to C- 4 of another glucose unit.

  •   Assertion and reason both are correct statements and reason explain the assertion.

  •   Assertion and reason both are correct statements but reason does not explain assertion. 

  •   Assertion is the correct statement and reason is the wrong statement.

  •   Assertion is the wrong statement and reason is the correct statement.

Carbohydrates are useful for plants-

  • To build cell membrane.

  • To support structure.

  • To serve as a storage molecule.

  • To help in the transport mechanism.

Consider the following compounds: 

Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose

The number of disaccharide carbohydrates is -

  • 3

  • 1

  • 4

  • 2

The main component present in starch and glycogen is : 

  • Amylose

  • Glacose

  • Amylopectin

  • Cellulose

D-Glucose  ? Saccharic acid

The oxidizing reagent used for this conversion is -

  • HI

  • Bromine water

  • HNO3 

  • H2SO4

The open structure of glucose cannot be established by -

  • HCN

  • Schiff’s test

  • Hydroxylamine test

  • Reaction with HI

The incorrect statement about nucleic acid is: 

  • It is responsible for heredity.

  • It is responsible for protein synthesis in a cell.

  • It is a constituent of the chromosome.

  • It is responsible for the transmission of chemical signals.

The correct statement about RNA is-

  •  The helical structure of RNA is mostly single-stranded .

  • It has deoxyribose sugar.

  • It is the chemical basis of heredity.

  • It contains thymine (T)

The essential amino acid is/are-

  • Valine

  • Alanine

  • Serine

  • All of the above.

The RBC deficiency is deficiency disease of:

 

  • Vitamin B1

  •  Vitamin B1

  •  Vitamin B12

  •  Vitamin B6

Pentaacetate of D-glucose reaction with NH2OH justifies the :
  •   Absence of aldehyde group.
  • Presence of ketone group.
  • Presence of aldehyde group.
  • Presence of alcohol group.
Correct statement among the following regarding the water present in egg upon boiling is: 
  • Precipitated out.
  • Adsorbed by the coagulated protein.
  • Absorbed by the eggshell.
  • Both (1) and (3) 

C12H22O11 H2O?2 mole of glucose 

The enzyme used for the above conversion is : 

  • Amylase 

  • Lactase

  • Maltase

  • Peptidase

Denaturation of proteins involve  -

  • Loss of tertiary structure.
  • Loss of primary structure.
  • Loss of peptide bonds.
  • Loss of linear chain structure.

The natural source of vitamin A among the following is -

  • Amla

  • Yeast

  • Fish liver oil

  • Exposure to sunlight

The reaction of concentrated sulphuric acid with carbohydrates (C12H22O11) is an example of

  • Dehydration

  • Oxidation

  • Reduction

  • Sulphonation

Deficiency of which vitamin causes osteomalacia ?

  • Vitamin A

  • Vitamin D

  • Vitamin K

  • Vitamin E

Which of the following statement is not true about glucose ?

  • It is an aldohexose.

  • It contains five hydroxyl groups.

  • It is a reducing sugar.

  • It is an aldopentose.

Fructose reduces Tollen's reagent due to -

  • Primary alcoholic group

  • Secondary alcoholic group

  • Enolisation of fructose followed by conversion to aldehyde by base

  • Asymmetric carbon

Which of the following is not a fat soluble vitamin ?

  • Vitamin A 

  • Vitamin B complex

  • Vitamin D 

  • Vitamin E

Which of the statements about "Denaturation" given below are correct?

Statements
a. Denaturation of proteins causes loss of secondary and tertiary structures of the
protein.
b. Denaturation leads to the conversion of double strand of DNA into a single strand.
c. Denaturation affects primary structure which gets distorted.
Options :

  • (a), (b) and (c)

  • (b) and (c)
  • (a) and (c)
  • (a) and (b)

During the process of digestion, the proteins present in food materials are hydrolyzed to amino acids. The two enzymes involved in the process amino acids

  • pepsin and trypsin

  • invertase and zymase

  • amylase and maltase

  • diastase and lipase

During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process

Proteins Enzyme (A) Polypeptides                Enzyme (B) Amino acids,

are respectively                

पाचन के प्रक्रम के दौरान, खाद्य पदार्थों में उपस्थित प्रोटीन को एमीनो अम्ल में जलअपघटित किया जाता है। प्रक्रम में शामिल दो एंजाइम

प्रोटीन  एंजाइम (A) पॉलीपेप्टाइड                 एंजाइम (B) एमीनो अम्ल,

क्रमशः हैं

(a) एमाइलेज और माल्टेज़

(b) डायस्टेज़ और लाइपेज़

(c) पेप्सिन और ट्रिप्सिन

(d) इन्वर्टेज़ और ज़ाइमेज़

  • amylase and maltase

  • diastase and lipase

  • pepsin and trypsin

  • invertase and zymase

α-D-glucose and β-D-glucose are :

  • Epimers

  • Anomers

  • Functional isomers

  • Chain isomers

Glucose +x Phenyl hydrazine → Osazone 'x' will be :

  •   2
  •   3
  •   4
  •   1

The base found in DNA but not in RNA :

  • Thymine
  • Adenine
  • Guanine
  • Cytosine

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