Test 1

Question 1

Gram negative cells

Answer 1

Show pink when stained. They have a layer of polyliposaccharides on top of the peptidoglycan cell wall and the plasma membrane.

Question 2

Gram positive cells

Answer 2

Show violet when stained. They have a peptidoglycan cell wall and a plasma membrane.

Question 3

Who fixes broken nitrogen?

Answer 3

Rhizobium and Nostoc

Question 4

Isotonic solution

Answer 4

The world is great. Everything is balanced.

Question 5

Hypotonic solution

Answer 5

Too little solute outside. Therefore, water moves inside the cell to balance the system. The cell will lyse or plasmolyse.

Question 6

Hypertonic solution

Answer 6

Too much solute outside. Therefore, water moves outside the cell to balance the system. The cell will shrink.

Question 7

Nitrogen fixing process

Answer 7

N2 –> NH3

Question 8

Sing to me of the differences between a compound and dissecting microscope.

Answer 8

Compounds are powerful. That’s why compound microscopes have up to 400x magnification and better resolution than dissecting microscopes. Dissecting microscopes do have better FOV and depth of field.