Q2c_2361_cell-structure and function-part2

Question 1

The structures in a cell composed of microscopic filaments and microtubules that function (among other things) to maintain cell shape & organelle position, and for various forms of movement including muscle contractions are the _____.

Answer 1

cytoskeleton

Question 2

The cell walls of plant cells are composed of

Answer 2

Cellulose

Question 3

Structures and/or functions associated with the cytoskeleton are__

Answer 3

All of these options are associated with cytoskeleton

Question 4

Channels of cytoplasm that connect adjacent cells through paired pits in the cell walls are___

Answer 4

plasmodesmata

Question 5

Cyanobacteria descended from the same evolutionary ancestor as ___

Answer 5

the plastids of all archaeplastida including plants & green algae and also red algae, etc.

Question 6

Cyanobacteria

Answer 6

have an internal membrane system that resembles chloroplast thylakoids and is important for photosynthesis.

Question 7

Heterocysts aid the colonies (organisms?) of the cyanobacterium Anabaena by

Answer 7

fixing and supplying nitrogen to the other cells.

Question 8

Cyanobacterial (Anabaena) cell types (in addition to the ordinary vegetative cells) include___.

Answer 8

all of these cell types may occur in Anabaena.

Question 9

A selectively permeable membrane separates clean, nearly pure water from very dirty water. (lots of dissolved salts, contaminants, soluble organics, etc.). In what directiion will the water move?

Answer 9

from clean side to dirty side

Question 10

If a plant cell is bathed in or in contact with a water solution with a lower total concentration of various dissolved substances (hypotonic) than its cytoplasm, water will __.

Answer 10

move into the cell and build up (turgor) pressure until the strong cellulose cell wall is fully expanded and stops further movement