Quiz 3

Question 1

Name two types of substances that can cross and two types of substances that can not cross the phospholipid bilayer

Answer 1

Smaller more hydrophobic molecules can pass, such as steroids, oxygen, and carbon dioxide.
Larger or more hydrophilic substances cannot cross, such as ions or carbohydrates.

Question 2

The following is where the ribosomes are assembled in eukaryotes:

Answer 2

nucleolus

Question 3

The following is the site of aerobic respiration in eukaryotes:

Answer 3

mitochondria

Question 4

The following is where proteins are made:

Answer 4

ribosome

Question 5

The following is where many of the cell’s lipids are made:

Answer 5

smooth endoplasmic reticulum

Question 6

Diagram a prokaryotic cell, showing its membrane, chromosomes, cell wall, and ribosome.

Answer 6

outer to inner:
cell wall circle
cell membrane circle
chromosome inside cell membrane
ribosome inside cell membrane

Question 7

Cell Biologists describe the creation of mitochondria and chloroplasts with the endosymbiotic hypothesis. Describe the endosymbiotic hypothesis and give two pieces of evidence for it.

Answer 7

The endosymbiotic hypothesis states that mitochondria and chloroplasts where once free living bacteria. They began living in the first living cells and eventually become permanently incorporated into the. Evidence includes the fact that both these organelles and bacteria have a double cell membrane, their own DNA in the form of a small circular chromosome, and their own Ribosomes.

Question 8

A bacteria lands in a jar of strawberry jam. The concentration of solute in the jam is much higher than in the jam than in the bacteria.
Will water enter or leave the bacteria?

Answer 8

Water will leave the bacteria.

Question 9

A bacteria lands in a jar of strawberry jam. The concentration of solute in the jam is much higher than in the jam than in the bacteria.
What is this movement of water called?

Answer 9

osmosis

Question 10

A bacteria lands in a jar of strawberry jam. The concentration of solute in the jam is much higher than in the jam than in the bacteria.
Is the Jam hypertonic or hypotonic relative to the bacteria?

Answer 10

The Jam is hypertonic