Inorganic and Organic Biomolecules

Q.

What enzymes are used in DNA replication?

Q. Define an operon. Giving an example, explain an Inducible operon.

Q.

Give one reason why DNA is a better genetic material compared to RNA.

Q.

What is the difference between triplets and codons?

Q.

Which of the following is not an antivirus software?

1. McAfee

2. Kaspersky

3. Norton

4. iOS

Q.

Why is genetic code triplet, not doublet?

Q.

Michaelis constant biomolecules____.

1. The rate of enzymatic activity

2. The rate of reaction

3. Substrate concentration at which the rate of reaction is maximum

4. Substrate concentration at which the reaction attains half of its maximum velocity

Q. Lecithin is a type of

1. wax
2. phospholipid
3. oil
4. simple fatty acid

Q.

Sucrose is made up of?

Q. Which among the following secondary metabolites are used as analgesics?

1. Ricin
2. Abrin
3. Anthocyanins
4. Morphine

Q. Explain the process of formation of complex proteins

Q. What is use of DNA gyrase enzyme?

Q.

Identify the enzymes responsible for the following processes in the digestion of carbohydrates :

1. 1. Maltase 2. Sucrase 3. Amylase 4. Lactase

2. 1. Sucrase 2. Amylase 3. Lactase 4. Maltase

3. 1. Lactase 2. Maltase 3. Sucrase 4. Amylase

4. 1. Amylase 2. Lactase 3. Maltase 4. Sucrase

Q. The major portion of the dry weight of plants comprises:

1. Carbon, nitrogen and sulphur
2. Carbon, hydrogen and oxygen
3. Calcium, magnesium and sulphur
4. Nitrogen, phosphorus and potassium

Q. Assertion: Sticky ends forms hydrogen bonds with their complementary cut counterparts.
Reason: In recombinant DNA technology, sticky end producing restriction enzymes are preferred over blunt ends producing restriction enzymes.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is true but the reason is false
4. Both the assertion and reason are false

Q. Assertion: Carbohydrates are more suitable for the production of energy in the body than proteins and fats.

Reason: Carbohydrates can be stored in the tissues as glycogen and can be used for the production of energy, whenever necessary.

1. Both assertion and reason are true and reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q. The four basic building blocks of life are

1. amino acids, fatty acids, sugars and nucleotides
2. amino acids, lipids, sugars and nucleotides
3. amino acids, fatty acids, lactose and nucleotides
4. proteins, fatty acids, sugars and nucleotides

Q. Match the columns and select the correct option.

$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ \text{(a)}& \text{Streptokinase}& \text{(i)}& \text{Acetobacter}\\ \text{(b)}& \text{Statins}& \text{(ii)}& \text{Trichoderma polysporum}\\ \text{(c)}& \text{Acetic acid}& \text{(iii)}& \text{Monascus purpureus}\\ \text{(d)}& \text{Cyclosporin A}& \text{(iv)}& \text{Streptococcus}\end{array}$

1. (a) - (iii), (b) - (i), (c) - (ii), (d) - (iv)
2. (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
3. (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv)
4. (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)

Q. Match the component of 'lac operon' of E.coli given under column-I with their function listed in column-II. Choose the answer with the correct combination of alphabet of the two columns:

Column-I	Column-II
(A) Structural gene	(i) Binding site for a repressor protein
(B) Operator gene	(ii) Codes for a repressor protein
(C) Promoter gene	(iii) Induce lactose transport from the medium
(D) Regulator gene	(iv) Codes for protein enzyme
	(v) Binding site for RNA polymerase

1. A - i, B - iv, C - ii, D – iii
2. A - iv, B - ii, C - i, D - iv
3. A - iii, B - i, C - v, D – ii
4. A - ii, B - iii, C - iii, D - i

Q. Vincristine and Vinblastin are obtained from:

1. Mirabilis jalapa
2. Catharanthus roseus
3. Arabidopsis thaliana
4. Rosmarinus officinalis

Q. The enormous diversity of protein molecules is due mainly to the diversity of:

1. Amino groups on the amino acids
2. R groups on the amino acids
3. Amino acid sequences within the protein molecule
4. Peptide bonds

Q. A nucleotide is formed of

1. Purine, pyrimidine and phosphate
2. Purine, sugar and phosphate
3. Nitrogen base, sugar and phosphate
4. Pyrimidine, sugar and phosphate.

Q. Compounds can be classified as organic and inorganic based on the presence of .

1. carbon and oxygen
2. carbon and hydrogen
3. hydrogen and oxygen
4. hydrogen and water

Q. Metabolic intermediates found in living system which are essential for growth and life is called:

1. Saponins
2. Primary metabolite
3. Secondary metabolite
4. Tertiary metabolites

Q. Which is/are not the correct function(s) of endoplasmic reticulum?

I. RER is involved in the protein synthesis, and responsible for post-translational modifications of the polypeptide chain.

II. RER is involved in synthesis of glycoproteins and glycolipids.

III. SER of liver cells is involved in detoxification of toxins and drugs.

IV. SER is also involved in synthesis and storage of lipids including cholesterol and phospholipids.

1. Only I
2. Only II
3. Only II & III
4. Only III & IV

Q. _________ is produced by virus infected cell that can protect non-infected cells from further viral infection.

1. Serotonin
2. Colostrum
3. Interferon
4. Histamine

Q. Okazaki fragments are joined in the correct sequence by:

1. DNA polymerase
2. DNA ligase
3. RNA polymerase
4. Primase

Q. Which one is nucleotide ?

1. Cytosine
2. Thymidine
3. Uridylic acid
4. Glutamic acid.

Q. Which of the following events would occur in ‘Lac–operon of E. coli when growth medium has high concentration of lactose?

1. Structural genes fail to produce polycistronic $mRNA$
2. Repressor protein binds to $RNA$ polymerase and prevents translation
3. Repressor protein attaches to the promoter sequence and represses the operator
4. Inducer molecule binds to repressor protein and $RNA$ polymerase binds to promoter sequence

Q. A complex formed by deoxyribose sugar, phosphate and nitrogen base is

1. Amino acid
2. Polypeptide
3. Nucleoside
4. Nucleotide.