Topic 1

Question 1

Factors that affect cyclosis

Answer 1

1. Light exposure
2. Temperature
3. pH
4. Ion concentration

Question 2

Facilitates the transport of materials within the cell and between the cell and its environment.

Answer 2

Cyclosis

Question 3

Chloroplasts are bridged to “monorails” comprised of a filamentous protein called _____.

Answer 3

Actin

Question 4

The organelle movement by cyclosis is critically dependent on:

Answer 4

1. Protein function
2. Reversible changes in protein shape
3. Protein-protein interactions
4. ATP hydrolysis

Question 5

Effect of elevated temperature on the rate of cyclosis

Answer 5

Increases rate for a brief moment, then decreases after prolonged exposure due to denaturation of proteins (bell curve)

Question 6

Effect of 10% saline on the rate of cyclosis

Answer 6

Decreases because the cells are hypotonic compared to the saline solution, thus water will rush out of the cell, and into its environment, causing cyclosis to cease

Question 7

Effect of pH on the rate of cyclosis

Answer 7

Increase

Question 8

Effect of light intensity on the rate of cyclosis

Answer 8

Increase

Question 9

Type of plastid that are non-pigmented organelles that typically have storage and/or metabolic function

Answer 9

Leucoplasts

Question 10

Leucoplasts develop from plastid precursors called _______.

Answer 10

Proplastids

Question 11

Where are leucoplasts found?

Answer 11

In tissues of plant organelles that receive little or no light

Question 12

Plastids that function in the biosynthesis and storage of starch that are commonly found in roots

Answer 12

Amyloplast

Question 13

Function in the biosynthesis and storage of proteins

Answer 13

Proteinoplast

Question 14

Function in the biosynthesis and storage of lipids

Answer 14

Elaioplast

Question 15

Where are the proteinoplast and elaioplast found?

Answer 15

Commonly found in endosperm