UNIT 1 Biology Test

Question 1

The number of _______ determines the bonding.

Answer 1

electrons

Question 2

Atoms with a diff number of electrons are called _______-

Answer 2

ions

Question 3

atoms with a diff. number of neutrons are called ___________

Answer 3

isotypes

Question 4

Order the levels of organization

Answer 4

atom-molecule-cell-tissue-organ-organ system-organism-populations-community-ecosystem-biosphere

Question 5

Describe how water is a polar molecule

Answer 5

The polarity (positive or negative charge) allows it to make hydrogen bonds—> this allows one water molecule to bond with 4 others.

Question 6

Cohesion

Answer 6

water molecules bonding to other water molecules

Question 7

adhesion

Answer 7

water molecules sticking to something other than water molecules

Question 8

surface tension

Answer 8

water molecules linking together on the surface of a body of water

Question 9

high heat evaporation

Answer 9

large of amount of water is required to change water from a liquid to a gas.

Question 10

water is less dense as a solid

Answer 10

when water reaches a certain temp (4 c) the hydrogen bonds changes angles plus molecules get further apart.

Question 11

Carbohydrates
monomer
function
examples

Answer 11

-monosaccharides
-energy and storing energy
-glucose,starch,cellulose, glycogen

Question 12

What type of bond forms a water molecule

Answer 12

hydrogen

Question 13

lipids
-monomer
-function
-examples

Answer 13

-carbon backbone
-insulation, protection, storing energy, structure
-fats, oilds, waxes, steroids, cholestroral

Question 14

protein
-monomer
-function
-examples

Answer 14

amino acids
-proteins?
-hari, fingernails, insulin, and hemoglobin.

Question 15

Nucleic acids
-monomer
-function
-examples

Answer 15

-nucleotides
-genetic info, and decoding information
-DNA and RNA

Question 16

List elements for each macromolecules

Answer 16

carbohydrates-CHO
Lipids-CHO
Protein-CHON
Nucleic Acid-CHONP

Question 17

Polar molecules carry __________ electrical charges at each ends of the molecules becuase of _________ sharing of electrons.

Non polar have ______ sharing of electrons so they have no charge.

Answer 17

uneven

unequal

equal

Question 18

What are the 6 properties of water that make is so unique?

Answer 18

Cohesion, Adhesion, surface tension, high heat vaporization, water is less dense as a solid, and water dissolves other polar substances.

Question 19

What is matter

Answer 19

anything that takes up space and has a mass.

Question 20

Most common elements are

Answer 20

Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, and Sulfer

Question 21

Characteristics of living things are…

Answer 21

-organization
-response to stimuli
-homeostasis
-metabolism
-ability to grow and develop
-ability to reproduce.

Question 22

Covalent bonds is the ____ bond that results from sharing electrons between elements to fill outer shell equally. they are bonds between 2 _______ ________

Answer 22

strongest

2 non-metals

Question 23

Organic compound is

Answer 23

compound contains carbon

Question 24

Carbohydrates end in _____

Answer 24

OSE!

Question 25

Polar molecule–>
Non polar moelcule—>

Answer 25

water
carbon, oxygen

Question 26

Homeostasis example

Answer 26

water, temp, chemichal

Question 27

Cohesion is_______ molecules bonding to other ________ molecules

Answer 27

water, water