exam 1 2017

Question 1

what atom is hydrogen covalently bondend to when it is part of a hydrogen bond

Answer 1

D

Question 2

according to the figure in chapter 1 which of the following groups of organisms shared a common ancestor most recently

Answer 2

Animals and plants

Question 3

which of the following allows communication between animal cells 
Atight junction 
B desmosome
C gap junction 
DCentrioles 
E peroxisome

Answer 3

C Gap junction

Question 4

which of the following polysaccharides contain branching

A glycogen 
B starch 
C cellulose 
D glycogen starch and cellulose 
Eglycogen and starch

Answer 4

Glycogen and starch

Question 5

a cross section of this organelle contains a “9+2” pattern of microtubules. what is it ?

Answer 5

eukaryotic flagella or cilia

Question 6

where would you find a lot of collagen

Answer 6

Extracellular matrix of animal cell

Question 7

channel proteins that specifically allow the passage of water across a membrane are known as

Answer 7

Aquaporins

Question 8

who proposed natural selection as the mechanism of evolution

Answer 8

Darwin

Question 9

which organelle does not contain membrane as part of its structure?

Answer 9

Ribosomes

Question 10

which of the following statements about water is not true

Answer 10

it realeses a large amout of heat when changing from liquid to vapor

Question 11

facilitated diffusion and active transport both

Answer 11

require a specific protein in the membrane

Question 12

what is the name of the special bond that can form between two cysteins

Answer 12

Disulfide bridge

Question 13

the cell walls of plants contain

Answer 13

Cellulose

Question 14

what kind of molecule i

Answer 14

x

Question 15

a molecule that accepts protons when in a solution is a

Answer 15

Base

Question 16

hydrogen bonds are important in

Answer 16

DNA water cellulose and proteins

Question 17

polymers are converted to monomers by

Answer 17

hydrolysis

Question 18

which of the following are part of the cell theory

Answer 18

all organisms are composed of one or more cells and all cells come from preexisting cells

Question 19

how many covalent bonds dose phosphorus usally form in biologically important molecules

Answer 19

5

Question 20

what is the function of ribosomes

Answer 20

Protein synthesis

Question 21

which of the following can be used as an energy source for active transport

Answer 21

ATB and an ion gradient

Question 22

a cell that is put into a hypertonic solution. what happens

Answer 22

water will leave the cell

Question 23

white blood cell is engulfing a foreign cell what is the name of this process

Answer 23

Ednocytosis

Question 24

which of the following statements about ATP is not true?
A. ATP is a nucleotide
B. ATP is used in eukaryotic cells but not prokaryotic cells
C. ATP is an energy carrier
D. AP has 3 phosphate groups
E. most of the ATP in Eukaryotic cells is made in the mitochondria

Answer 24

B. ATP is used in eukaryotic cells but not prokaryotic cells

Question 25

``` which of the following is not a monosaccharide A ribose B fructose C glycogen D peptidoglycan E maltose ```

Answer 25

Maltose

Question 26

which of the following is a polysaccharide used for energy storage in animals ``` A Chitin B Triglyceride C Glycogen D Peptidoglycan E Maltose ```

Answer 26

Glycogen

Question 27

``` prokaryotic cells contain _____ A mitcochondria B ribosomes C lysosomes D cytoskeleton e none ```

Answer 27

B Ribosomes

Question 28

which of the following organelles have their own DNA and Ribosomes ``` A choroplast B Mitochondria C centriols D A and B E none ```

Answer 28

D chloroplast and mitochondria

Question 29

which of the following statements is not true regarding glycogen starch and cellulose

Answer 29

All three are easily digested by most animals

Question 30

molecules which dissolve in water are called

Answer 30

hydrophilic

Question 31

why are most cells very small

Answer 31

small cells have a large surface area to volume ratio

Question 32

which of the following would not be found in a plant cell ``` A Mitochondria B cytoskeleton C golgi apparatus D Vacuole E endoplasmic reticulum ```

Answer 32

Endoplasmic reticulum

Question 33

which of the following contains enzymes that can hydrolyze many kinds of macromolecules ``` A golgi apparatus B lysosomes C mitochondria D Ribosomes E endoplasmic reticulum ```

Answer 33

Lysosomes

Question 34

many eukaryotic cells make proteins that are exported from the cell where are these proteins synthesized

Answer 34

rough endoplasmic reticulum

Question 35

which organelle sorts modifies and packages newly synthesized proteins before being sent out to their final destinations

Answer 35

Golgi Apparatus

Question 36

which of the following regular the entry and exit of materials from the cell

Answer 36

plasma membrane

Question 37

what scientist demonstrated that flies are not spontaneously generated by rotting meat

Answer 37

Redi

Question 38

which of the following has the greatest electro negativity ``` carbon phosphorus oxygen hydrogen nitrogen ```

Answer 38

oxygen

Question 39

which of the following have prokaryotic cell structure ``` A bacteria B archaea C eukarya D both A and B E both B and C ```

Answer 39

D both Bacteria and Archaea

Question 40

a scientist isolate chloroplast and studies them in a testable what kind of experiment is being done

Answer 40

in vitro

Question 41

hydrophobic interactions

Answer 41

can hold two non polar molecules together

Question 42

which of the following would increase the fluidity of a membrane A. increasing the temp B increasing the amount of unsaturated fatty acid C using shorter fatty acids D a and C E a b and C

Answer 42

E a b and c

Question 43

ribozymes are

Answer 43

Rna catalyst

Question 44

lipid syntesis in eukaryotic cells takes place in the

Answer 44

smooth endoplasmic reticulum

Question 45

which of the following can move in and out of cells by diffusion

Answer 45

O2 carbon dioxide and lipids

Question 46

which of the following best describes a phospholipid

Answer 46

glycerol joined to 2 fatty acids and 1 phosphate containing group

Question 47

denaturation of a protein changes the primary structure

Answer 47

false

Question 48

``` all lipids are____ A triglycerides B polar C hydrophilic D polymers of fatty acids E more soluble in nonpolar solvents than in water ```

Answer 48

more soluble in non polar solvents than in water

Question 49

49 according to the theory of evolution

Answer 49

all organisms share a common ancestor

Question 50

the organelles of cells can be separated from one another to study the this separation is called

Answer 50

cell fractionation