Questions and answers for exam Preparation

MCQs

Total Questions : 159 | Page 3 of 16 pages

Question 21. If the ends of the following polysaccharide are pulled, which one would stretch the most?

Glycogen
Starch
Cellulose
None of these

Discuss Question

Answer: Option B. -> Starch
Answer: (b).Starch

Question 22. Water content of active protoplasm is

Discuss Question

Answer: Option D. -> 90%
Answer: (d).90%

Question 23. Which of the following is not an electron carrier class in the electron transport chain?

Flavoproteins
Cytochromes
Iron - sulfur proteins
Cytochrome c oxidase

Discuss Question

Answer: Option D. -> Cytochrome c oxidase
Answer: (d).Cytochrome c oxidase

Question 24. The composition of the inner mitochondrial membrane is most like that of

the outer mitochondrial membrane
the cell's plasma membrane
some bacterial plasma membranes
the nuclear membrane

Discuss Question

Answer: Option C. -> some bacterial plasma membranes
Answer: (c).some bacterial plasma membranes

Question 25. The cell membrane is made up of

lipoproteins
cellulose
phospholipids
phosphoproteins

Discuss Question

Answer: Option A. -> lipoproteins
Answer: (a).lipoproteins

Question 26. If complex III were incorporated into an artificial lipid vesicle in order to demonstrate it's proton translocating ability in isolation, which of the following would be an appropriate electron donor?

Cytochrome c red
Cytochrome c peroxidase
Ubiquinol (UQH2)
Cytochrome c oxidase

Discuss Question

Answer: Option C. -> Ubiquinol (UQH2)
Answer: (c).Ubiquinol (UQH2)

Question 27. Specialized type of peroxisome and the site of glyoxylate pathway in certain plants is known as

gly-peroxisome
lysosome
glyoxysome
none of these

Discuss Question

Answer: Option C. -> glyoxysome
Answer: (c).glyoxysome

Question 28. Which of the following statements about the outer mitochondrial membrane is not true?

The outer membrane is impermeable to hydrogen ions
The outer membrane is highly permeable to substances of small molecular weight
The outer membrane is about 50% lipid and 50% protein by weight
The outer membrane contains porins

Discuss Question

Answer: Option A. -> The outer membrane is impermeable to hydrogen ions
Answer: (a).The outer membrane is impermeable to hydrogen ions

Question 29. Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

Both have their own DNA
Both have their own ribosomes
Both strongly resemble prokaryotes, especially in size
Both can live and function independently of the cell

Discuss Question

Answer: Option D. -> Both can live and function independently of the cell
Answer: (d).Both can live and function independently of the cell

Question 30. The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

the mitochondrial matrix is hypotonic to the cellular cytoplasm
the mitochondrial matrix is hypertonic to the cellular cytoplasm
mitochondria were derived from a symbiotic bacterium
mitochondria are surrounded by a semi permeable membrane

Discuss Question

Answer: Option D. -> mitochondria are surrounded by a semi permeable membrane
Answer: (d).mitochondria are surrounded by a semi permeable membrane