BIO 181 Quizzes Exam 1 Part 1

Question 1

0 / 2 pts

In your own multicellular body, cells with different functions have different DNA.

You Answered

True

Correct Answer

False

That’s not correct

Question 2

2 / 2 pts

After a cell is pancake shaped in a cell culture dish, the order of events that occurs as a cell walks is (pick the best order):

Lamellipodia, filopodia, cell muscle, retraction fiber.

Cell muscle, cell super-glue, retraction fiber, lamellipodia.

Correct!

Filapodia, lamellipodia, cell muscle, retraction fiber.

Two of the above.

None of the above.

Good work

Question 3

2 / 2 pts

When cancer cells are crowded by surrounding cells, the cancer cells become spherical and they can still go through cell division.

Correct!

True

False

Good work

Question 4

2 / 2 pts

What limits how big a cell can be?

Color

Wavelength

Correct!

The surface area to volume ratio

Resolution

Type of electron microscopy.

Good work

Question 5

2 / 2 pts

Loss of the cell wall is required for the endosymbiotic theory.

Correct!

True

False

Good work

Question 6

2 / 2 pts

Loss of the cell wall was required for the endomembrane system theory.

Correct!

True

False

Good work

Question 7

2 / 2 pts

Ribosomes bound to some of the membrane invaginations in the endomembrane theory.

Correct!

True

False

Good work

Question 8

0 / 2 pts

Motility improved the fitness of these early cells because:

It allowed them to make a nuclear envelope.

It caused them to acquire ribosomes.

Correct Answer

It allowed them to move away from predators and towards food.

Two of the above.

You Answered

None of the above.

That’s not correct

Question 9

2 / 2 pts

A single pass trans-membrane protein that is an alpha helix can make a channel.

True

Correct!

False

Good work

Question 10

2 / 2 pts

Active transport uses ATP to move components in parallel with their concentration gradient, that is: from a high concentration to a low concentration.

True

Correct!

False

Good work

Question 11

0 / 2 pts

The ER is contiguous with the Golgi apparatus.

You Answered

True

Correct Answer

False

That’s not correct

Question 12

2 / 2 pts

It is a simple matter (i.e., thermodynamically favorable) for a vesicle to form from the endoplasmic reticulum.

True

Correct!

False

Good work

Question 13

0 / 2 pts

The plasma membrane gets new lipids from:

The lumen of the ER.

The lumen of the Golgi apparatus.

Making new lipids at the plasma membrane.

You Answered

The nucleus.

Correct Answer

None of the above.

That’s not correct

Question 14

0 / 2 pts

When a vesicle fuses with the plasma membrane the contents of the lumen of the vesicle are:

Ligands that enter the nucleus.

You Answered

Ligands that become the part of the plasma membrane.

Correct Answer

Ligands that are used in cell communication.

Two of the above.

Part of the nuclear pore complex.

That’s not correct

Question 15

2 / 2 pts

Molecular motors use ATP as the energy source to power the molecular motors.

Correct!

True

False

Good work

Question 16

0 / 2 pts

Cilia and microvilli contain a similar number of parallel actin filaments.

You Answered

True

Correct Answer

False

That’s not correct

Question 17

2 / 2 pts

To get into the nucleus a component has to have the correct signal sequence and pass through a nuclear pore.

Correct!

True

False

Good work

Question 18

2 / 2 pts

Chromosomes are made out of Euchromatin.

True

Correct!

False

Good work

Question 19

2 / 2 pts

Many chemotherapy drugs act by arresting the cell in M-phase of the cell cycle.

Correct!

True

False

Good work

Question 20

2 / 2 pts

In your body not all cells go through the cell cycle.

Correct!

True

False

Good work

Question 21

2 / 2 pts

Gap1 of the cell cycle represents the time when the cell is doing what it is supposed to do as part of its cell type. In other words, that is when a liver cell is doing its function as a liver cell.

Correct!

True

False

Good work

Question 22

2 / 2 pts

Cytoplasmic signal transduction controls the checkpoints of the cell cycle.

Correct!

True

False

Good work

Question 23

2 / 2 pts

At the cell cycle checkpoints, a cyclin works with a cyclin-dependent kinase (i.e., Cdk) to regulate the checkpoint.

Correct!

True

False

Good work

Question 24

0 / 2 pts

The synthesis/presence of cyclin is what turns on the Cdk as the Cdk is always present but it is the cyclin that is synthesized and degraded in cycles.

Correct Answer

True

You Answered

False

That’s not correct

Question 25

2 / 2 pts

After DNA synthesis (i.e., S-phase) an identical copy of the DNA has been made and this is present in the two chromatids when viewed as the chromosome.

Correct!

True

False

Good work

UnansweredQuestion 26

0 / 4 pts

There are two basic types of communication within cells. One type is called signal transduction and it takes days to weeks to occur. The other type is called signal transduction and it takes minutes to hours to act.

Answer 1:

You Answered(You left this blank)

Correct Answer

nuclear

Answer 2:

You Answered(You left this blank)

Correct Answer

cytoplasmic

UnansweredQuestion 27

0 / 4 pts

There are two basic forms of cytoplasmic signaling (i.e. signal transduction). One uses and the other uses .

Answer 1:

You Answered(You left this blank)

Correct Answer

calcium

Answer 2:

You Answered(You left this blank)

Correct Answer

kinases

Question 28

2 / 2 pts

When insulin binds to a receptor, this signal first uses ________.

You Answered

Correct Answers

kinases

UnansweredQuestion 29

0 / 4 pts

Two types of second messengers discussed in lecture can exist downstream of a plasma membrane receptor. These are and .

Answer 1:

You Answered(You left this blank)

Correct Answer

GTP-binding proteins

Answer 2:

You Answered(You left this blank)

Correct Answer

adenylyl cyclase

Question 30

2 / 4 pts

An important checkpoint regulator is at the Gap2/M-phase transition. Here cyclin B and Cdk1 activate and form MPF which becomes a (two words) and causes the DNA to condense into .

Answer 1:

You Answered(You left this blank)

Correct Answer

histone kinase

Answer 2:

Correct!chromosomes

Question 31

2 / 4 pts

The begins to be destroyed at the metaphase of the cell cycle causing the chromosomes to begin to .

Answer 1:

You Answered(You left this blank)

Correct Answer

cyclin B

Answer 2:

You Answereddecompose

Correct Answer

decondense

Question 32

2 / 2 pts

There is communication between cells and communication ______ cells.

Correct!

Correct Answers

within

Question 33

0 / 2 pts

For a cell to respond to a ligand released from a neighboring cell where the ligand diffuses directly from one cell to another is called ______ communication.

You Answered

Correct Answers

paracrine

Question 34

2 / 2 pts

For a cell to respond to a ligand released from a cell and uses the circulatory system to get to the responding cell it is called _______ communication.

Correct!

Correct Answers

endocrine

Question 35

2 / 2 pts

When a cell “talks to itself” it is called ________ communication.

Correct!

Correct Answers

autocrine

Question 36

4 / 4 pts

MAPK has two different functions depending on where this kinase acts in the (two words). If the kinase becomes active during interphase the cell is triggered to progress through the (two words).

Answer 1:

Correct!cell cycle

Answer 2:

You Answeredcellcycle

Correct Answer

cell cycle

Question 37

2 / 2 pts

One point where MAPK can become active is _______ of the cell cycle to settle down the cytoplasm.

You Answered

Correct Answers

M-phase

Question 38

1 / 2 pts

Why is it important to know the limitations of technology?

Your Answer:

with out knowing the limitations of technology science cannot advance

Question 39

3 / 3 pts

List the three categories of cells in the body with regard to the cell cycle.

Your Answer:

cells that never go through the cell cycle

cells that can be introduce to go through the cell cycle

cells that constantly go through the cell cycle.

Question 40

2 / 3 pts

Explain the evolutionary origin of mitochondria.

Your Answer:

PPE cell was sick and attempted to eat another cell pp that was good at creating ATP. The PPP created extra ATP and gave it to the PPE. The health of the PPE improved and it kept the PPP within to create ATP.

Question 41

2 / 2 pts

Explain how the vesicles are carried from the Golgi apparatus to the plasma membrane.

Your Answer:

1. proteins are synthesized by ribosomes and enter the RER

2. Vesicles bud off from the RER and carry proteins to the Golgi Apparatus

3. The Golgi Apparatus modifies proteins

4. The Vesicles bud off from the Golgi Apparatus and carry modified proteins to the plasma protein

UnansweredQuestion 42

0 / 0 pts

While still using RPNow, using your pen/pencil and paper, draw a phospholipid and make sure the numbers of carbons are clearly identified.

________________________________________

This question requires a hand-drawn response. When you have finished the drawing, hold the drawing up to your web camera for verification. Then you will scan the image of the drawing (acquired via smartphone, camera or scanner) and load the image into your computer as a file. Then go to the “Exam 1 Part 2” link and upload the file within 45 minutes.

This question is worth 4 points, and credit will be given under Exam 1 Part 2 in your grades area.

Click “Done” below for your answer once you’ve held up the drawing to the camera.

Correct Answer

Done, and I now have 45 minutes to upload the drawing to Exam 1 Part 2

Click above when finished

Quiz Score: 62 out of 96