1. The Cell

Question 1

When cells touch they stop growing and dividing. What is this property of cells called?

Answer 1

Contact inhibition

Question 2

What determines the fluidity of the cell membrane?

Answer 2

Ratio or cholesterol to fatty acids

Question 3

What makes rough endoplasmic reticulum rough?

Answer 3

Ribosomes

Question 4

Which organelle is involved in lipid synthesis?

Answer 4

Smooth endoplasmic reticulum

Question 5

Which organelle is involved in waste removal?

Answer 5

Lysosome

Question 6

Name one organelle which is involved in producing proteins for export.

Answer 6

Rough endoplasmic reticulum

Question 7

Which organelle is involved in energy production?

Answer 7

Mitochondria

Question 8

Which organelle has a cis and a trans face?

Answer 8

Golgi apparatus

Question 9

What is the resting phase of the cell cycle called?

Answer 9

Interphase

Question 10

In general, what kinds of molecules can diffuse freely across the cell membrane?

Answer 10

Hydrophobic

Question 11

Which RNA is involved in transcription?

Answer 11

Messenger RNA

Question 12

Which RNA brings amino acids to the developing polypeptide?

Answer 12

Transfer RNA

Question 13

What is the part of the nucleus that produces ribosomal RNA called?

Answer 13

Nucleolus

Question 14

When the DNA and associated proteins in the nucleus is uncoiled and actively involved in transcription it is called?

Answer 14

Euchromatin

Question 15

When the DNA and associated proteins in the nucleus is condensed and not actively involved in transcription it is called?

Answer 15

Heterochromatin

Question 16

What is the heterochromatin which represents the inactive X chromosome in the normal female called?

Answer 16

Barr bodies

Question 17

What nuclear feature is indicative of a high degree of cellular metabolic activity.

Answer 17

Nucleolus

Question 18

What is the term for ribosomes which are free in the cytoplasm?

Answer 18

Polysomes

Question 19

Which organelle is involved in packaging and adding carbohydrates to newly synthesized proteins?

Answer 19

Golgi apparatus

Question 20

Which organelle, apart from the nucleus, has its own DNA content?

Answer 20

Mitochondria

Question 21

What is the smallest of the cytoskeletal elements?

Answer 21

Microfilaments

Question 22

Which intermediate filament is found in epithelia?

Answer 22

Cytokeratin

Question 23

What is the largest cytoskeletal element?

Answer 23

Microtubules

Question 24

Which organelle is involved in the destruction of damaged cellular components and bacteria?

Answer 24

lysosomes

Question 25

Which of the following will increase the fluidity of a cell membrane?

saturated phospholipids

unsaturated phospholipids

surface proteins

glycolipids

Answer 25

unsaturated phospholipids

Question 26

Active DNA in the nucleus is called?

Answer 26

euchromatin

Question 27

A Plasmacyte is a cell which produces antibodies. Which organelle would you expect to be prominent?

mitochondria

polysomes

lysosomes

rough endoplasmic reticulum

Answer 27

roough ER

Question 28

What is a glycocalyx?

Answer 28

carbohydrate residues associated with the surface of cells.

Question 29

What is apoptosis

Answer 29

Programmed cell death

Question 30

Which organelle has cristae?

Answer 30

mitochondria

Question 31

The main function of cilia is to increase the surface area of cells. T/F?

Answer 31

False. Microvilli.

Cilia main function = beating pattern in respiratory and female reproductive tracts