Exam 1

Question 1

What is science?

Answer 1

The study of the natural world.

Question 2

List the steps of scientific method in order.

Answer 2

1. Observe and generalize
2. Make a hypothesis
3. Make a testable prediction
4. Experiment
5. Revise hypothesis and repeat

Question 3

What is the variable that you set in an experiment?

Answer 3

Independent variable.

Question 4

Why are replicates important?

Answer 4

Because if you only experiment once, you don’t that it is a fact, it may just be a fluke or there were mistakes in your experiment.

Question 5

You can use scientific method to determine which brand of batteries is the best.

Answer 5

True.

Question 6

What is biological literacy?

Answer 6

1. Using the process of scientific inquiry to think creatively about real-world issues
2. Communicate those thoughts to others
3. Integrate them into your decision-making.

Question 7

Name 4 of the characteristics of life?

Answer 7

1. Made of cells
2. Different chemical structure
3. Utilize energy
4. Reproduction and growth

Question 8

What is biology?

Answer 8

The study of living things.

Question 9

Which is the strongest type of bond?

Answer 9

Covalent.

Question 10

How do bonds relate to energy?

Answer 10

Bonds store energy. When they are broken, they release energy.

Question 11

Which type of energy is stored energy?

Answer 11

Potential energy.

Question 12

Why is water so important for life, give at least 2 properties and explain its affect on life?

Answer 12

1. It is more dense in solid form than liquid form - important so that fish don’t die every time there is a freeze (because ice floats instead of sinking)
2. Has a high heat of vaporization - you cool off when you sweat and the water evaporates
3. Is a good solvent - useful in many areas

Question 13

What is the difference between hydrophobic and hydrophilic?

Answer 13

Hydrophobic molecules are afraid of water and congregate so they have less contact with it.
Hydrophilic molecules are molecules that are water loving.

Question 14

What is a hydrogen doner?

Answer 14

Acid.

Question 15

What does the pH scale measure?

Answer 15

Hydrogen ions.

Question 16

Which has more resolution?

Answer 16

Electron microscope.

Question 17

What is the main difference between prokaryote and eukaryote cells?

Answer 17

Eukaryotes have nucleus and organelles, while prokaryotes do not.

Question 18

Name 2 differences between plant and animal cells?

Answer 18

1. Plant cells have a cell wall and animal cells don’t
2. Plant cells have chloroplasts and animals don’t
3. Animal cells have centrosomes and plant cells don’t.

Question 19

Name 4 eukaryotic cell structures (parts of the cell) and give a function for each.

Answer 19

1. Nucleus - information center
2. Mitochondria - power house of the cell
3. Golgi bodies - packing and shipping center
4. ER - manufacturing

Question 20

Which type of cell junction is designed to create a water proof junction?

Answer 20

Tight junction.

Question 21

Compare the 3 types of transport into the cell.

Answer 21

1.Passive transport
2. Active transport
3. Bulk transport

Passive transport doesn’t require energy, while active transport and bulk transport do. Passive transport moves molecules from high concentration to low concentration, while active transport moves them from low concentration to high concentration. Bulk transport uses membranes.

Question 22

Describe the structure of membrane, what are its components and the model that is used to describe the structure?

Answer 22

1.The membrane is made out of phospholipids with the hydrophilic heads on the outside and the hydrophobic tails on the inside.
2. Proteins float amidst the phospholipids
3. The fluid mosaic model describes it

Question 23

If a cell was placed in a hypertonic solution what will happen to the cell?

Answer 23

Shrink.

Question 24

Diffusion states that molecules will move from _____ concentration to _______ concentration.

Answer 24

High, low.

Question 25

What types of transporter is highly specific changes conformation during transportation of molecules.

Answer 25

Facilitate transport.

Question 26

What type of transporter moves 2 types of molecules in opposite directions?

Answer 26

Antiporter.

Question 27

What are plant cell walls made of?

Answer 27

Cellulose.