BIOCHEMISTRY QUESTION FOR 2024

1) During denaturation, proteins will not lose their structure, with regard to

Correct! Wrong!

Proteins wont lose the PRIMARY STRUCTURE during denaturation

2) The characteristic features of the peptide bond include all of the following, except

Correct! Wrong!

'always has a cis configuration" is obviously not a characteristic feature of the peptide bond

3) The force maintaining the primary structure of a protein

Correct! Wrong!

Peptide bonds is the force maintaining the primary structure of a protein

4) The amino acid which did not allow formation of alpha-helix

Correct! Wrong!

Proline does not allow formation of alpha helix

5) One of the following proteins does not have a quaternary structure

Correct! Wrong!

Albumin does not have a quaternary structure

6) An example of a lyase is:

Correct! Wrong!

Fumarase is the only lyase in the option

7) Digestive enzymes belong to the class of:

Correct! Wrong!

Digestive enzymes belong to the class of hydrolases

8) All of the following metalloenzymes contain copper, except

Correct! Wrong!

Glutathione peroxidase is the only enzyme in the options that does not contain copper

9) All compounds listed below act as competitive inhibitors of enzymes, except

Correct! Wrong!

Fluoride is not a competitive inhibitor

10) Iodoacetate inhibit enzyme by reacting with which particular group?

Correct! Wrong!

It inhibits enzyme by reacting with sulfhydryl

11) Glucose and galactose are:

Correct! Wrong!

They are both epimers

12) D-mannose is:

Correct! Wrong!

D-mannose is the 2nd epimer of glucose

13) A pair of sugars differing from each other in the functional group is called

Correct! Wrong!

They are simply anomers

14) Reducing sugars are differentiated from non-reducing sugars by:

Correct! Wrong!

Benedict's test is the answer

15) All the following have glycosidic bond, except:

Correct! Wrong!

N-acetylglucosamine has no glycosidic bond

16) All the following are homopolysaccharides, except

Correct! Wrong!

Heparin is not a homopolysaccharide. It is a heteropolysaccharide.

17) Which of the following is not a phospholipid

Correct! Wrong!

Cerebroside is the answer. It is a non-phosphorylated lipid

18) Which of the following lipids is not present in vegetable oils

Correct! Wrong!

Cholesterol is the answer. It not present in vegetable oils

19) Sphingomyelin on hydrolysis yields all the following, except,

Correct! Wrong!

It does not yield Glucose.

20) A ganglioside on hydrolysis gives all the following except:

Correct! Wrong!

Glycerol is the correct answer

21) Which of the following is a dietary essential

Correct! Wrong!

Linolenic acid is the correct answer. They are dietary essential because the cannot be synthesized by the body and have to be supplied in the diet

22) Which of the following is not an amphipathic molecule

Correct! Wrong!

23) Which contains copper?

Correct! Wrong!

Cytochrome oxidase is the correct answer. It contains copper

24) All are true with ATP synthase, except:

Correct! Wrong!

Proton flow is from F1 to F0 is the correct answer.

25) Enzymes may be used for the following, except

Correct! Wrong!

Enzymes are obviously not nutrients

26) Which enzyme requires chloride ion as activator?

Correct! Wrong!

Amylase is the correct answer

27) Enzymes bind substrate:

Correct! Wrong!

"by covalent bonds" is the correct answer.

28) Which of the following is a folate antagonist in eukaryocytes?

Correct! Wrong!

Amethopetrine is the correct answer.

29) The protein having predominantly alpha helical structure is:

Correct! Wrong!

Collagen is the correct answer.

30) How many peptided bonds are present in glutathione

Correct! Wrong!

Glutathione has 3 peptide bonds

BIOCHEMISTRY QUIZ FOR 2024
RESULT
This was set and marked Iferikigwe, Victor Chidera (Iferika JR); UNMSA PRO, Chief Technical Officer UNMSA Academic Committee