Cellular Biology

Question 1

Cell Theory states…

Answer 1

• All living things composed of cells, basic functional unit of life
• Chemical reactions of life occur in cells
• Arise from preexisting cells
• Carry genetic info as DNA

Question 2

What displays selective permeability?

Answer 2

Cell Membrane

Question 3

Where does rRNA synthesis occur?

Answer 3

Nucleolus

Question 4

What is function of smooth ER?

Answer 4

• Metabolism/detox drugs and poisons
• Production of lipids including steroid hormones
• Stores Ca++ ions in muscles cells

Question 5

Where does most metabolism take place?

Answer 5

Cytoplasm

Question 6

Cyclosis

Answer 6

Streaming movement in cell –> transport

Question 7

Centrioles

Answer 7

• Not bound by membrane
• Located in centrosome region
• NOT in plants

Question 8

Autolysis

Answer 8

Injured/dying cell ruptures lysosomes to self-destruct

Question 9

Microtubules

Answer 9

• Hollow rods of tubulin

- Compose centrioles, cilia, flagella

Question 10

Microfilaments

Answer 10

• Solid rods of actin

- Move materials across plasma membrane in contraction phase of cell division

Question 11

Endocytosis

Answer 11

-Bring in large volumes of extracellular material

Question 12

Pinocytosis

Answer 12

-Ingestion of fluids/small particles

Question 13

Phagocytosis

Answer 13

-Engulfing large particles

Question 14

Exocytosis

Answer 14

-Fusion of vesicle with cell membrane and release of large volume

Question 15

Does material pass through cell membrane in endocytosis or exocytosis?

Answer 15

NO

Question 16

Intracellular circulation…

Answer 16

• Brownian movement (KE spreads small particles)
• Cyclosis (streaming by circular motion)
• ER (continuous passageway from plasma membrane to nuclear membrane)

Question 17

Prophase

Answer 17

• Chromosomes condense
• Centrioles separate and move to opposite poles
• Spindle apparatus forms
• Nuclear membrane dissolves

Question 18

Metaphase

Answer 18

• Centrioles at opposite poles
• Fibersattach at kinetochore
• Metaphase plate

Question 19

Anaphase

Answer 19

• Centromeres split

- Sister chromatids separate and pulled to opposite poles by shortening fibers

Question 20

Telophase

Answer 20

• Spindle apparatus disappears
• Nuclear membrane forms
• Each nucleus is diploid and chromosomes uncoil

Question 21

Cytokinesis

Answer 21

• Near end of telophase

- Cleavage furrow (animal) cell plate (plants)

Question 22

Which stage is responsible for Law of Independent Assortment?

Answer 22

Anaphase I

Question 23

Where does cellular respiration occur in prokaryotes?

Answer 23

Cell membrane

Question 24

How many functional gametes are formed in women during meiosis?

Answer 24

1