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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 02/09/2022
QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - Biomolecules, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test
1.
Which of the following amino acids are achiral?
Alanine
Leucine
Proline
Glycine
2.
Which of the following are epimers?
D(+)-Glucose and D(+)-Galactose
D(+)-Glucose and D(+)-Mannose
Neither (a) nor (b)
Both (a) and (b)
3.
α -D (+) Glucose and β-D (+) glucose are ______.
Epimers
Anomers
Enantiomers
Conformational isomers
4.
Insulin, a hormone chemically is ______.
Fat
Steroid
Protein
Carbohydrates
5.
If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.
TACGAACT
TCCGAACT
TACGTACT
TACGRAGT
6.
Glucose is an aldose. Which one of the following reactions is not expected with glucose?
It does not form oxime
It does not react with Grignard reagent
It does not form osazones
It does not reduce tollens reagent
7.
Which of the following statement is correct?
Ovalbumin is a simple food reserve in egg-white
Blood proteins thrombin and fibrinogen are involved in blood clotting
Denaturation makes protein more active
Insulin maintains the sugar level of in the human body
8.
Complete hydrolysis of cellulose gives ______.
L-Glucose
D-Fructose
D-Ribose
D-Glucose
9.
Which of the following vitamins is water soluble?
Vitamin E
Vitamin K
Vitamin A
Vitamin B
10.
11.
Among the following L- serine is ______.
12.
The pyrimidine bases present in DNA are ______.
Cytosine and Adenine
Cytosine and Guanine
Cytosine and Thiamine
Cytosine and Uracil
13.
Vitamin B2 is also known as ______.
Riboflavin
Thiamine
Nicotinamide
Pyridoxine
14.
The number of sp2 and sp3 hybridised carbon in fructose are respectively ______.
1 and 4
4 and 2
5 and 1
1 and 5
15.
Which one of the following is not produced by body?
DNA
Enzymes
Hormones
Vitamins
16.
In aqueous solution of amino acids mostly exists in ______.
NH2-CH(R)-COOH
NH2-CH(R)-COO-
H3N+-CH(R)-COOH
H3N+-CH(R)-COO-
17.
The correct statement regarding RNA and DNA respectively is ______.
the sugar component in RNA is an arabinos and the sugar component in DNA is ribose
the sugar component in RNA is 2’-deoxyribose and the sugar component in DNA is arabinose
the sugar component in RNA is an arabinose and the sugar component in DNA is 2’-deoxyribose
the sugar component in RNA is ribose and the sugar component in DNA is 2’-deoxyribose
18.
Among the following the achiral amino acid is ______.
2-ethylalanine
2-methylglycine
2-hydroxymethylserine
Tryptophan
19.
In a protein, various amino acids linked together by ______.
Peptide bond
Dative bond
\(\alpha\) - Glycosidic bond
\(\beta\) - Glycosidic bond
20.
The central dogma of molecular genetics states that the genetic information flows from______.
Amino acids Protein DNA
DNA Carbohydrates Proteins
DNA RNA Proteins
DNA RNA Carbohydrates
21.
\(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.
Heptanoic acid
2-Iodohexane
Heptane
Heptanol
22.
Which one given below is a non-reducing sugar?
Glucose
Sucrose
maltose
Lactose
23.
The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.
L-Erythrose, L-Threose, L-Erythrose, D-Threose
D-Threose, D-Erythrose, L-Threose, L-Erythrose,
L-Erythrose, L-Threose, D-Erythrose, D-Threose
D-Erythrose, D-Threose, L-Erythrose, L-Threose
24.
Which one of the following rotates the plane polarized light towards left?
D(+) Glucose
L(+) Glucose
D(-) Fructose
D(+) Galactose
1.
(d)
Glycine
2.
(d)
Both (a) and (b)
3.
(b)
Anomers
4.
(c)
Protein
5.
(a)
TACGAACT
6.
(b)
It does not react with Grignard reagent
7.
(c)
Denaturation makes protein more active
8.
(d)
D-Glucose
9.
(d)
Vitamin B
10.
(d)
11.
(c)
12.
(c)
Cytosine and Thiamine
13.
(a)
Riboflavin
14.
(d)
1 and 5
15.
(d)
Vitamins
16.
(d)
H3N+-CH(R)-COO-
17.
(d)
the sugar component in RNA is ribose and the sugar component in DNA is 2’-deoxyribose
18.
(c)
2-hydroxymethylserine
19.
(a)
Peptide bond
20.
(c)
DNA RNA Proteins
21.
(a)
Heptanoic acid
22.
(b)
Sucrose
23.
(d)
D-Erythrose, D-Threose, L-Erythrose, L-Threose
24.
(c)
D(-) Fructose
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