Biochemistry

A lipid bilayer is permeable to

(A) Urea
(B) Fructose
(C) Glucose
(D) Potassium

Carrier protein can

(A) Transport only one substance
(B) Transport more than one substance
(C) Exchange one substance to another
(D) Perform all of these functions

The ability of the cell membrane to act as a selective barrier depends upon

(A) The lipid composition of the membrane
(B) The pores which allows small molecules
(C) The special mediated transport systems
(D) All of these

Bulk transport across cell membrane is accomplished by

(A) Phagocytosis
(B) Pinocytosis
(C) Extrusion
(D) All of these

From the biological viewpoint, solutions can be grouped into

(A) Isotonic solution
(B) Hypotonic solutions
(C) Hypertonic solution
(D) All of these

The cellular organelles called “suicide bags” are

(A) Lysosomes

(B) Ribosomes

(C) Nucleolus

(D) Golgi’s bodies

The absorption of intact protein from the gut in the fetal and newborn animals takes place by

(A) Pinocytosis
(B) Passive diffusion
(C) Simple diffusion
(D) Active transport

Mitochondrial DNA is

(A) Circular double stranded
(B) Circular single stranded
(C) Linear double helix
(D) None of these

The fatty acids can be transported into and out of mitochondria through

(A) Active transport
(B) Facilitated transfer
(C) Non-facilitated transfer
(D) None of these

The most active site of protein synthesis is the

(A) Nucleus
(B) Ribosome
(C) Mitochondrion
(D) Cell sap