Multiple Choice QuestionsWhich of the following is not a fat soluble vitamin?
Vitamin-B complex
Vitamin-D
Vitamin-E
Vitamin-A
Which of the statements about 'Denaturation' given below are correct?
Statements
(i) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(ii) Denaturation leads to the conversion of double strand of DNA into single strand.
(iii) Denaturation affects primary structure which gets destroyed.
(ii) and (iii)
(i) and (iii)
(i) and (ii)
(i), (ii) and (iii)
The secondary structure of a protein refers to
alpha helical backbone
hydrophobic interactions
sequence of alpha amino acid
fixed configuration of the polypeptide backbon
A codon has a sequence of A, and specifies a particular B that is to be incorporated into a C. What are A, B, C
| A | B | C |
| 3 bases | amino acid | carbohydrate |
| A | B | C |
| 3 acids | carbohydrate | protein |
| A | B | C |
| 3 base | protein | amino acid |
| A | B | C |
| 3 bases | mino acid | protein |
Which of the following set consists only of essential amino adds?
Alanine, tyrosine, cystine
Leucine, lysine, tryptophane
Alanine, glutamine, lycine
leucine, praline, glycine
Which of the following is a ketohexose?
Glucose
Sucrose
Sucrose
Ribose
C.
Sucrose
The term hexose refers to the presence of six carbon atoms and term keto shows the presence of ketonic group. Thus, the compound which contains 6 C atoms and one group is called ketohexose. Among the given only glucose and fructose are six C compounds. Out of them, glucose contains an aldehyde group while fructose contains a ketonic group. Hence, the example of ketohexose is fructose.
Sucrose on hydrolysis gives
glucose and maltose
glucose and lactose
glucose and fructose
only glucose
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