Biology exam 1

Question 1

What are the 4 major molecules of life?

Answer 1

DNA, lipids, proteins, carbohydrates

Question 2

What is homeostasis?

Answer 2

Maintaining an internal environment despite a changing external environment

Question 3

What is the scientific term for humans?

Answer 3

Homosapeins

Question 4

Is an ion a charged atom?

Answer 4

Yes

Question 5

What does Golgi apparatus do?

Answer 5

It serves as a post office for packaging + shipping proteins in a cell

Question 6

What is mitochondria responsible for?

Answer 6

Making ATP

Question 7

What is the plasma membrane made up of?

Answer 7

The bilayer of phospholipids

Question 8

What is the weakest bond?

Answer 8

Hydrogen

Question 9

What is the strongest bond?

Answer 9

Ions

Question 10

What does the nucleus do?

Answer 10

Houses genetic information

Question 11

What are ribosomes?

Answer 11

Protein synthesis

Question 12

What is smooth ER?

Answer 12

Lipid synthesis

Question 13

What is the function of the organelle peroxisome?

Answer 13

Detoxifies waste

Question 14

What is the function of the organelle cytoskeleton?

Answer 14

Maintains cell shape

Question 15

What is the function of the organelle lysome?

Answer 15

Contains the digestive enzymes

Question 16

What are the stages if cellular respiration?

Answer 16

1. Glycolysis 2. Preparatory step 3. Citric acid cycle 4. Electron transport chain

Question 17

What is the function of blood?

Answer 17

Transport materials

Question 18

What is the function of elastic connective?

Answer 18

Flexibility and stretch

Question 19

What is the function of stratified epithelial?

Answer 19

Protection

Question 20

What is the function of the nervous system?

Answer 20

Transmit electrical impulses

Question 21

What is the function of tight junctions?

Answer 21

Seal plasma membranes tightly together

Question 22

What is the function of desmosomes?

Answer 22

Allow tissues to stretch and bend

Question 23

What is the function of gap junctions?

Answer 23

To facilitate movement of substances between cells

Question 24

What is found in the derms of the skin?

Answer 24

1. Hair follicle 2. Sebaceous glands 3. Blood vessels 4. Sensory nerve endings

Question 25

Three facts about cells

Answer 25

1. They are living 2. All cells come from pre-existing cells 3. All organisms are either unicellular or multicellular

Question 26

Levels of biological organization

Answer 26

1. Atoms 2. Molecules 3. Cells 4. Tissue 5. Organs 6. Organ system 7. Organism

Question 27

What is matter?

Answer 27

Anything that takes up space. It is composed of elements.

Question 28

When are atoms the most stable?

Answer 28

When their shells are full

Question 29

How is potential energy stored?

Answer 29

The bond between atoms

Question 30

what do tight junctions do?

Answer 30

Seal plasma membranes tightly together

Question 31

what are tissues?

Answer 31

Group of cells with a common function

Question 32

how are carbohydrates formed?

Answer 32

By simple sugars (process called photosynthesis)

Question 33

what does the sodium/potassium pump do?

Answer 33

Expels unwanted waste, stockpiles needed ones, maintains cell volume

Question 34

What is passive transport?

Answer 34

It is when a substance is transported without expending energy.

Question 35

How is passive transport conducted?

Answer 35

Diffusion, osmosi, heavily relies on diffusion

Question 36

what are ribosomes responsible for?

Answer 36

Protein synthesis

Question 37

What are carbohydrates used for?

Answer 37

Energy and structural support

Question 38

what do atoms consist of?

Answer 38

Nucleus, shells, molecules

Question 39

What are elements made up of?

Answer 39

Atoms

Question 40

What is specialized for movement?

Answer 40

Cilia, flagella

Question 41

what will happen if a protein is exposed to a drastic change in temp. Or pH?

Answer 41

Denaturation