test 1

Question 1

what is the correct list of the levels of biological organization from smallest (left) to largest (right)?

Answer 1

atom- molecule - cell - tissue - organ

Question 2

what’s an example of a cell that does not have a nucleus?

Answer 2

fungi

Question 3

eucaryotic organisms are . ..

Answer 3

fungi, animals, plants, and protists

Question 4

what’s an example of homeostasis

Answer 4

maintaining a relatively constant body temp of 37* C

Question 5

what’s an example of behavior?

Answer 5

bacteria using flagella to swim towards a sugar molecule.

Question 6

adaptations arise spontaneously and unintentionally as a result of random changes in —–.

Answer 6

DNA

Question 7

the branch of biology that deals with naming and classifying living things is called?

Answer 7

taxonomy

Question 8

what is the correct scientific name for modern humans?

Answer 8

Homo sapiens

Question 9

Humans and mushrooms are in the same …

Answer 9

domain

Question 10

an official scientific name consists of ….

Answer 10

genus + species

Question 11

mushrooms and other living things that acquire energy by decomposing the dead bodies of producers and consumers are called …

Answer 11

saprotrophs

Question 12

plants generate their own food using the energy provided by sunlight. therefore plants are classified as …

Answer 12

autotrophs

Question 13

what is the first step in the scientific method?

Answer 13

make an observation

Question 14

what is a hypothesis?

Answer 14

a possible explanation for a natural event based on available evidence.

Question 15

performing an experiment is one way to test a hypothesis. How else might you test a hypothesis?

Answer 15

take a series of measurements

Question 16

what is a theory?

Answer 16

a scientific idea supported by many well-tested hypotheses

Question 17

carbon C is an example of a(N) …..

Answer 17

element

Question 18

oxygen atoms accounts for approximately how much of the weight of a typical living thing?

Answer 18

65%

Question 19

which 2 types of subatomic particles are attracted to each other based on charge differences?

Answer 19

protons and electrons

Question 20

a certain isotope of carbon has 6 protons, 6 electrons, and 7 neutrons per atom. What is the atomic mass of this isotope of carbon?

Answer 20

13

Question 21

what is the atomic number of carbon

Answer 21

4

Question 22

how many electrons are located in the valence shell of a carbon atom?

Answer 22

4

Question 23

how many protons does one atom of nitrogen contain?

Answer 23

7

Question 24

ions are atoms with a negative or positive charge because they have gained or lost one or more ……

Answer 24

electrons

Question 25

what kind of chemical bonds are found in a molecule of methane ?

Answer 25

nonpolar covalent bonds

Question 26

what kind of chemical bonds attach water molecules to other water molecules?

Answer 26

hydrogen bonds

Question 27

in a double covalent bond 2 atoms share ....

Answer 27

4 electrons

Question 28

a carbon atom can complete its valence shell by ....

Answer 28

forming a single covalent bond with each of 4 H atoms

Question 29

a solution with a pH of 6.0 is considered

Answer 29

acidic

Question 30

are substances that neutralize acids or bases, thus helping to maintain pH.

Answer 30

buffers

Question 31

a solution with a pH of 4.5

Answer 31

is 10 times more acidic than a solution with a pH of 5.5

Question 32

what functional groups is found in all amino acids?

Answer 32

NH2

Question 33

what functional groups is found in all alcohols?

Answer 33

OH

Question 34

proteins are polymers constructed from 20 different types of smaller monomer subunits called ---

Answer 34

amino acids

Question 35

in a disaccharide 2 monosaccharides are linked by a type of covalent bond called a ---- bond.

Answer 35

ester bond

Question 36

glycerol and fatty acids are the building blocks for a type of ...

Answer 36

lipid

Question 37

in general, dehydration reactions join --- together to make ----

Answer 37

monomers , polymers

Question 38

glucose and fructose each have the molecular formula: C6H12O6. They are entirely from .....

Answer 38

isomers

Question 39

humans store some excess energy in the liver as glycogen, which is made entirely from ...

Answer 39

glucose

Question 40

ribose and deoxyribose are ....

Answer 40

pentoses

Question 41

what are not polysaccharides

Answer 41

collagen

Question 42

------- fatty acids form straight chains of carbons and hydrogens and are ---- .

Answer 42

saturated and solid

Question 43

what are the primary structural components of all cell membranes

Answer 43

phospholipids

Question 44

chaperone proteins ....

Answer 44

help other proteins fold properly

Question 45

a helicase and B-sheets are important structural components of ....

Answer 45

proteins

Question 46

a protein that has lost it's normal 3-dimensional shape is said to be ....

Answer 46

denatured

Question 47

what polysaccharide is a structural component of plant cell walls?

Answer 47

cellulose

Question 48

glucose is a -------with ----- carbon atoms.

Answer 48

monosaccharides ; 6

Question 49

what is an example of a functional group that's acidic?

Answer 49

COOH