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Home » GAT Subject » Botany Mcqs » Aptitude Test - 14
1.A dipeptide has
A. 2 amino acids and 1 peptide bond
B. 2 amino acids and 2 peptide bonds
C. 2 amino acids and 3 peptide bonds
D. 2 amino acids and 1 peptide bond
2.The most common secondary structure is
A. α-helix
B. β-pleated sheet
C. β-pleated sheet parallel
D. α-helix
3.Myoglobin is a
A. protein with primary structure
B. protein with secondary structure
C. protein with tertiary structure
D. protein with primary structure
4.Fibrous protein such as silk fibroin consists of polypeptide chains arranged in
A. α-helix
B. β-pleated sheet
C. β-helix
D. α-helix
5. α-helix has
A. 3.4 amino acid residues/turn
B. 3.6 amino acid residues/turn
C. 3.8 amino acid residues/turn
D. 3.4 amino acid residues/turn
6.Tertiary structure is maintained by
A. peptide bond
B. hydrogen bond
C. di-sulphide bond
D. peptide bond
7.Haemoglobin has
A. primary structure
B. secondary structure
C. tertiary structure
D. primary structure
8. Disulphide bonds are formed between
A. cysteine residues that are close together
B. cystine residues that are close together
C. proline residues that are close together
D. cysteine residues that are close together
9.The 3-D structure of protein can be determined by
A. Nuclear magnetic resonance
B. X-ray crystallography
C. both a and b
D. Nuclear magnetic resonance
10.. The elements present in the proteins are
A. Carbon, hydrogen, nitrogen, and oxygen.
B. Carbon, hydrogen, and oxygen.
C. Hydrogen, nitrogen, and oxygen.
D. Carbon, hydrogen, nitrogen, and oxygen.
11.Proteins are made up of
A. Lipids
B. Amino acids
C. Fatty acids
D. Lipids
12. How many types of amino acids are commonly found in proteins?
A. 25
B. 20
C. 15
D. 25
13.The basic structure of amino acids consists of a central carbon atom also known as alpha carbon bonded to
A. Amino group(NH2), Hydrogen
B. Amino group, Carboxylic acid(COOH), and a Hydrogen atom
C. Amino group and Carboxyl group
D. Amino group(NH2), Hydrogen
14.Amino acids are joined by
A. Hydrogen bond
B. Peptide bond
C. Ionic bond
D. Hydrogen bond
15. The primary structure of the protein represents
A. linear sequence of amino acids joined by peptide bond
B. The 3-dimensional structure of protein
C. the helical structure of protein
D. linear sequence of amino acids joined by peptide bond
16. Which of the following statements about amino acids is correct?
A. Amino acids are classified according to the structures and properties of their side chains.
B. Amino acids in proteins are mainly in the D-configuration.
C. Amino acids are unchanged at neutral pH
D. Amino acids are classified according to the structures and properties of their side chains.
17.Which type of bonding is responsible for the secondary structure of proteins?
A. Disulfide bridge between cysteine residues.
B. Peptide bonds between amino acids.
C. Hydrogen bonding between the C=O and N-H groups of peptide bonds.
D. Disulfide bridge between cysteine residues.
18.Which of the following most accurately describes how secondary structure in proteins is stabilized?
A. Through ionic bonds operating between oppositely charged amino acid side chains.
B. Through covalent bonds joining different parts of the peptide backbone.
C. Through hydrogen bonds between different amino acids side chains.
D. Through ionic bonds operating between oppositely charged amino acid side chains.
19.Enzymes are
A. Proteins
B. Carbohydrates
C. Nucleic acids
D. Proteins
20.Amino acids are
A. building blocks of carbohydrates
B. building blocks of nucleic acids
C. building blocks of lipids
D. building blocks of carbohydrates
21. The simplest amino acid is
A. Proline
B. methionine
C. glycine
D. Proline
22.How many amino acids are synthesized by our bodies?
A. 20
B. 30
C. 40
D. 20
23.Which of the following is caused due to extreme lack of proteins?
A. Malaria
B. Typhoid
C. Kwashiorkor
D. Malaria
24.Type strain is used for referring to?
A. species
B. genus
C. family
D. species
25.% Similarity (%S) of each strain to every other strain is calculated by which method?
A. Intuitive Method
B. Numerical Taxonomy
C. Genetic Relatedness
D. Intuitive Method
26.What are ribosomes composed of?
A. Proteins
B. DNA
C. RNA
D. Proteins
27.Which of the following are characteristics of archaebacterial different from eubacteria?
A. methane-producers
B. extreme halophiles
C. thermoacidophiles
D. methane-producers
28.Which among the following come under Gram-positive eubacteria?
A. Clostridium
B. Actinomyces
C. Rhizobium
D. Clostridium
29.Which among the following kingdoms were proposed by Whittaker?
A. Monera
B. Protista, Fungi
C. Plantae, Animalia
D. Monera
30.According to Bergey�s Manual of Systematic Bacteriology, prokaryotes that lack a cell wall belong to the group?
A. Gracilicutes
B. Firmicutes
C. Tenericutes
D. Gracilicutes
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