211. Imino acid among these compounds is
A
serine
B
proline
C
tyrosine
D
lysine
Answer :
proline
group 212. Glycosidic linkage is an
A
amide linkage
B
ester linkage
C
ether linkage
D
acetyl linkage
Answer :
ether linkage
213. Which of the following is a steroid hormone ?
A
Cholesterol
B
Adrenaline
C
Thyroxine
D
Progesterone
Answer :
Progesterone
214. Which is correct statement ?
A
Starch is a polymer of $$\alpha $$ - glucose
B
In cyclic structure of fructose, there are four carbons and one oxygen atom
C
Amylose is a component of cellulose
D
Proteins are composed of only one type of amino acids
Answer :
Starch is a polymer of $$\alpha $$ - glucose
215. Chargaff’s rule states that in an organism
A
amount of adenine $$(A)$$ is equal to that of cytosine $$(C)$$ and the amount of thymine $$(T)$$ is equal to that of guanine $$(G)$$
B
amounts of all bases are equal
C
amount of adenine $$(A)$$ is equal to that of thymine $$(T)$$ and the amount of guanine $$(G)$$ is equal to that of cytosine $$(C)$$
D
amount of adenine $$(A)$$ is equal to that of guanine $$(G)$$ and the amount of thymine $$(T)$$ is equal to that of cytosine $$(C)$$
Answer :
amount of adenine $$(A)$$ is equal to that of thymine $$(T)$$ and the amount of guanine $$(G)$$ is equal to that of cytosine $$(C)$$
216. How many $$C$$ - atoms are there in a pyranose ring?
A
3
B
5
C
6
D
7
Answer :
5
217. Which of the following pairs can be distinguished by Fehling’s solution ?
A
Glucose and fructose
B
Glucose and sucrose
C
Methanal and ethanal
D
Hydroxypropanone and benzaldehyde.
Answer :
Glucose and sucrose
218. In both $$DNA$$ and $$RNA,$$ heterocylic base and phosphate ester linkages are at -
A
\[C_{5}^{'}\,\] and \[C_{1}^{'}\] respectively of the sugar molecule
B
\[C_{1}^{'}\,\] and \[C_{5}^{'}\] respectively of the sugar molecule
C
\[C_{2}^{'}\] and \[C_{5}^{'}\] respectively of the sugar molecule
D
\[C_{5}^{'}\] and \[C_{2}^{'}\] respectively of the sugar molecule
Answer :
\[C_{1}^{'}\,\] and \[C_{5}^{'}\] respectively of the sugar molecule
219. Which one of the following statements is not true regarding $$(+)$$ lactose?
A
On hydrolysis, $$(+)$$ lactose gives equal amount of $$D\left( + \right)$$ glucose and $$D\left( + \right)$$ galactose.
B
$$\left( + \right)$$ Lactose is a $$\beta {\text{ - }}$$ glucoside formed by the union of a molecule of $$D\left( + \right)$$ glucose and a molecule of $$D\left( + \right)$$ galactose.
C
$$\left( + \right)$$ Lactose is a reducing sugar and does not exhibit mutarotation.
D
$$\left( + \right)$$ Lactos, $${C_{12}}{H_{22}}{O_{11}}$$ contains $$8 - OH$$ groups.
Answer :
$$\left( + \right)$$ Lactose is a reducing sugar and does not exhibit mutarotation.
220. Which of the vitamins given below is water soluble ?
A
Vitamin E
B
Vitamin K
C
Vitamin C
D
Vitamin D
Answer :
Vitamin C