Chapters 1-3

Question 1

Define Biology

Answer 1

The area of science that studies life and it’s process

Question 2

After making careful observations a scientist constructs….

Answer 2

makes a hypothesis

Question 3

The process of natural selection was the mechanism for what

Answer 3

evolution

Question 4

Define analogous

Answer 4

have similar functions but differ in orgin

Question 5

Levels of organizations in living organism

Answer 5

Atoms
Molecules
 Cells
Tissues
Organs
Organ systems
Organisms
Populations
Communities
Ecosystem
Biosphere

Question 6

Define Matter

Answer 6

All substance in the universe that has mass and occupies space

Question 7

Define atomic number

Answer 7

the number of protons in a given atom

Question 8

Define Isotopes

Answer 8

Decay with a nuclear break up and emit a significant amount of radioactive energy
Carbon-12, Carbon-13, Carbon-14

Question 9

Define pH

Answer 9

the negative logarithm of the hydrogen ion concentration in a solution

Question 10

Define Electrons

Answer 10

Negatively charged particles of an atom with almost no mass

Question 11

Define Protons

Answer 11

Positively charged particles located in the nucleus of an atom

Question 12

Define covalent bonds

Answer 12

when two atoms share a pair of electrons

Question 13

Why is water polar

Answer 13

Water molecules are polar with ends that exhibit partial positive and negative charges. Such opposite charges make water molecules attract each other through hydrogen bonds

Question 14

What an orbital and energy shell are (in relation to electrons)

Answer 14

The area around a nucleus where an electron is most likely to be found is the orbital.

Question 15

A modified form of cellulose found in the exoskeleton of insects and crustaceans is

Answer 15

Chitin

Question 16

Define Hydrolysis reactions

Answer 16

The covalent bond connecting the monomer units in sugar can be broken by the addition of a water molecule.

Question 17

Monomer of Carbohydrates

Answer 17

monosaccharides

Question 18

Monomer of Nucleic acid

Answer 18

nucleotides

Question 19

Monomer of Proteins

Answer 19

amino acids

Question 20

Lipids

Answer 20

fatty acids

Question 21

most common monosaccharide

Answer 21

glucose

Question 22

levels of protein structure

Answer 22

Primary
Secondary
           α helix
           𝛽 sheets
Tertiary
Quaternary

Question 23

Define an enzyme

Answer 23

Proteins that can carry out catalysis in organisms

Humans do not have the cellulose digesting enzyme.

Question 24

bases of DNA

Answer 24

A
T
C
G

Question 25

Bases of RNA

Answer 25

A
U
C
G