Cell Organelles and Membranes

Question 1

• Is the structural and functional unit of life
• It is considered as the basic unit of biological activity

Answer 1

Cell

Question 2

• Largest and most prominent organelle
• Most cells of the body contains nucleus
• Contains the DNA

Answer 2

Nucleus

Question 3

Network of interconnecting membranes enclosing channels or cisternae.

Answer 3

Endoplasmic Reticulum (ER)

Question 4

• A network of flattened smooth membrane and vesicles.
• Functions in protein sorting, packaging, and secretion.

Answer 4

Golgi Apparatus

Question 5

• Are spherical vesicles enveloped by a single membrane.
• Are regarded as the digestive tract of the cell, since they are actively involved in digestion of cellular distances.

Answer 5

Lysosomes

Question 6

• Centre for the cellular respiration and energy metabolism.
• Regarded as the POWER HOUSES OF THE CELL.

Answer 6

Mitochondria

Question 7

• Separates the cell from external environment
• It has highly selective permeability properties.

Answer 7

Plasma Membrane

Question 8

A type of membrane transport that does not require energy to move substances across cell membranes.

Answer 8

Passive transport

Question 9

The salient features of active transport are:
- This form of transport requires energy.
- Is unidirectional.

Answer 9

Active transport

Question 10

Carries SINGLE solute across the membrane.

Answer 10

Uniport system

Question 11

The transport carries TWO solutes in the SAME DIRECTION across the membrane.

Answer 11

Symport system

Question 12

Carries TWO solutes orr ions in OPPOSITE direction.

Answer 12

Antiport system

Question 13

The process of actively transporting molecules into the cell by engulfing it with its membrane.

Answer 13

Endocytosis

Question 14

The term id derived from the greek word “phagein” which means to Eat.

Answer 14

Phagocytosis

Question 15

Literally means “ drinking by the cell”

Answer 15

Pinocytosis