Common Components Of All Cell (Structure And Function)

Question 1

composed of a phospholipid bilayer.
The polar heads of the phospholipids are at the surfaces of the membrane; the nonpolar tails make up the
interior of the membrane.
Proteins embedded in the membrane have various functions

Answer 1

Plasma membrane

Question 2

A semifluid interior, where chemical reactions occur.
Consists of mainly water (80-85%). The remaining constituents are proteins (10-15%), lipids (2-4%), polysaccharides (1%) and nucleic acids (1%).

Answer 2

Cytoplasm

Question 3

Made of sugars (deoxyribose), phosphates and nitrogen bases
Genetic material of all cellular organisms
carries the information needed to direct protein synthesis and replication

Answer 3

DNA (deoxyribonucleic acid)

Question 4

Site of protein synthesis in the cell

Answer 4

Ribosomes

Question 5

Who discovered ribosomes

Answer 5

Discovered by George E.
Palade in 1955

Question 6

DNA carries the information needed to direct…..

Answer 6

protein synthesis and replication

Question 7

Acts as the boundary between the outside and inside of a cell.
Acts like a gatekeeper, regulating the passage of molecules and ions into and out of the cell.

Answer 7

Plasma membrane

Question 8

the phospholipids are at the surfaces of the membrane

Answer 8

Polar heads

Question 9

make up the
interior of the membrane.

Answer 9

Nonpolar tails

Question 10

embedded in the membrane have various functions

Answer 10

Protein