BIO213: Chemistry Of Amino Acids And Proteins TMA1 question and answer

BIO213: Chemistry Of Amino Acids And Proteins TMA1

Question 1 : Which of these is a contractile protein
A. myosin
B. casein
C. fibrinogen
D. hemoglobin

Answer to question 1 is A. myosin
Question 2 : Which of these is a transport protein?
A. Fibrinogen
B. Somatotropin
C. Serum albumin
D. Elastin

Answer to question 2 is C. Serum albumin
Question 3 : Which of the following not true of enzymes?
A. Enzymes are reaction-specific
B. Enzymes are activated by inhibitors
C. Enzymes have active sites
D. Enzymes can be denatured

Answer to question 3 is B. Enzymes are activated by inhibitors

Question 4 : Which of these statements is not true of proteins
A. They are formed by a linkage between the α-carboxyl of one amino acid and the α-amino group of another acid
B. They are formed by amino acids joined by peptide linkage
C. They are formed by a linkage between an α-amino group of one amino acid and the α-amino group of another acid
D. One molecule of water is lost in the formation of the peptide bonds for protein formation

Answer to question 4 is C. They are formed by a linkage between an α-amino group of one amino acid and the α-amino group of another acid

Question 5 : Which of these is a structural protein
A. collagen
B. keratin
C. hemoglobin
D. elastin

Answer to question 5 is B. keratin

Question 6 : Which of these is a basic amino acid?
A. Lysine
B. Valine
C. Glycine
D. Threonine

Answer to question 6 is A. lysine

Question 7 : Which of these amino acids is tasteless?
A. Isoleucine
B. Arginine
C. Histidine
D. Leucine

Answer to question 7 is D. leucine

Question 8 : All proteins are made up of _____ standard amino acids
A. 20
B. 10
C. 17
D. 23

Answer to question 8 is A. 20

Question 9 : One of these describes how the chains of the secondary structure interact through the R groups of the amino acid residues
A. Primary Structure of protein
B. Secondary structure of protein
C. Tertiary structure of protein
D. Quaternary Structure of protein

Answer to question 9 is B. Secondary structure of protein
Question 10 : The percentage of Nitrogen usually found in protein is ________
A. 75
B. 16
C. 50
D. 32

Answer to question 10 is B. 16

Question 11 : One of these proteins is involed in low light vision
A. rhodopsin
B. opsin
C. actin
D. ovalbumin

Answer to question 11 is B. opsin

Question 12 : Which of these amino acids has a bitter taste?
A. Isoleucine
B. Serine
C. Glycine
D. leucine

Answer to question 12 is D. leucine

Question 13 : Which of these is not an aromatic amino acid
A. lysine
B. Tryptophan
C. Tyrosine
D. Proline

Answer to question 13 is A. lysine

Question 14 : Which of these is NOT a monocarboxylic amino acid
A. Serine
B. Alanine
C. Valine
D. Aspartic acid

Answer to question 14 is D. aspartic acid

Question 15 : Which of these amino acid contain sulphur?
A. Asparagine
B. Isoleucine
C. Leucine
D. Methionine

Answer to question 15 is D. methionine

Question 16 : Which of these is not a simple protein?
A. Glutelins
B. nucleoproteins
C. globulins
D. albumins

Answer to question 16 is C. globulins

Question 17 : One of these is not true of proteins
A. Pure proteins are odourless
B. Proteins are highly soluble in water
C. Pure proteins are generally tasteless
D. All proteins can be denatured

Answer to question 17 is D. All proteins can be denatured

Question 18 : One of these amino acids is a component of a food flavour enhancer
A. tyrosine
B. Histidine
C. Valine
D. Glutamic acid

Answer to question 18 is D. Glutamic acid

Question 19 : Which of these is an essential amino acid for humans
A. Glutamic acid
B. Tryptophan
C. Alanine
D. Glycine

Answer to question 19 is B. Tryptophan

Question 20 : Amino acids are considered amphoteric for one of the following reasons
A. They are all asymmetric
B. They all show optical activity
C. They are not soluble in water
D. They have both basic and acidic properties

Answer to question 20 is D. They have both basic and acidic properties