Bio12Weeklyquizesexam1

Front 1

True or false:
Water potential (which is used to predict the direction water will move under various conditions) is determined gravity, pressure, and solute concentration.

Back 1

False

Front 2

True or False:
Proteins and other large molecules pass through biological membranes by facilitated diffusion.

Back 2

True

Front 3

True or False:
Simple diffusion allows oxygen, carbon dioxide, and water to pass through biological membranes.

Back 3

True

Front 4

True or False:
All carbohydrates in plasma membrane are consist of short-chain oligosaccharides that are attached to membrane proteins.

Back 4

False

Front 5

True or False:
The only polysaccharide plants use for storage is starch.

Back 5

False

Front 6

True or False:
All phenolic substances are stored in plant cell vacuoles.

Back 6

False

Front 7

True or False:
Osmosis is the passive movement of any moderate sized molecule through biological membranes.

Back 7

True

Front 8

True or False:
Secondary metabolites provide protection from the sun’s radiation, defend plants against herbivores and pathogens, and serve as chemical signals allowing plants to respond to their environment.

Back 8

False

Front 9

True or False:
Turgor pressure in turgid plant cells is equal to wall pressure.

Back 9

True

Front 10

True or False:
Nucleotides can function as energy carriers (such as ATP) or can form long chain polymers (as in RNA or DNA).

Back 10

False

Front 11

Lipids found in plants include

a. cutin, a lipid found in the bark of trees and shrubs.
b. saturated fatty acids such as peanut oil and corn oil.
c. phospholipid, a non-polar molecule that is a primary component of cellular membranes
d. sitosterol, the most common sterol found in plants.

Back 11

c

Front 12

Which of the following is not true of active transport?



a. Active transport requires energy in the form of ATP.

b. Active transport involves a H+-coupled cotransport system.

c. Active transport requires carrier proteins.

d. Active transport is concentration dependent, and materials cannot be moved against a concentration gradient.

Back 12

b

Front 13

In plants, proteins



a. account for more than 50% of the dry weight of the organism.

b. are constructed using nitrogen from ammonia, nitrates, and nitrites.

c. are composed entirely of different amino acids than animal proteins.

d. are found primarily in leaves

Back 13

a

Front 14

Which of the following is not true of membrane proteins?



a. Some membrane proteins facilitate the movement of water through membranes.

b. Some membrane proteins are bound only to the surface of the membrane and do not extend into it.

c. All membrane proteins float in the lipid bilayer.

d. Some membrane proteins are enzymes involved in such activities as converting one form of energy to another.

Back 14

c

Front 15

Cellulose



a. is the most abundant organic compound known.

b. is a polymer of the monosaccharide ribose.

c. can be digested by most animals and fungi.

d. is an example of a protein.

Back 15

c

Front 16

T/F
Secondary metabolites provide protection from the sun’s radiation, defend plants against herbivores and pathogens, and serve as chemical signals allowing plants to respond to their environment.

Back 16

True

Front 17

T/F
Simple diffusion allows oxygen, carbon dioxide, and water to pass through biological membranes.

Back 17

True

Front 18

T/F
Osmosis is the passive movement of any moderate sized molecule through biological membranes.

Back 18

False

Front 19

T/F
All carbohydrates in plasma membrane are consist of short-chain oligosaccharides that are attached to membrane proteins.

Back 19

False

Front 20

T/F
Water potential (which is used to predict the direction water will move under various conditions) is determined gravity, pressure, and solute concentration.

Back 20

True

Front 21

T/F
The only polysaccharide plants use for storage is starch.

Back 21

False

Front 22

T/F
Nucleotides can function as energy carriers (such as ATP) or can form long chain polymers (as in RNA or DNA).

Back 22

True

Front 23

T/F
All phenolic substances are stored in plant cell vacuoles

Back 23

False

Front 24

T/F
Proteins and other large molecules pass through biological membranes by facilitated diffusion.

Back 24

False

Front 25

T/F
Turgor pressure in turgid plant cells is equal to wall pressure.

Back 25

True

Front 26

Cellulose

Back 26

is the most abundant organic compound known

Front 27

Which of the following is not true of active transport?

Back 27

Active transport is concentration dependent and materials cannot be moved against a concentration gradient

Front 28

Which of the following is not true of membrane proteins?

Back 28

All membrane proteins float in the lipid bilayer

Front 29

Lipids found in plants include

Back 29

sitostel, the most common sterol found in plants

Front 30

In plants, proteins

Back 30

are constructed using nitrogen from ammonia, nitrates, and nitrites

Front 31

T/F
The phragmosome is a sheet of cytoplasm that forms where the new cell wall will ultimately form during cell division

Back 31

True

Front 32

T/F
The cell plate forms as the phragmosome directs Golgi vesicles to the center of the dividing cell.

Back 32

False

Front 33

T/F
Mitosis can occur in haploid cells.

Back 33

True

Front 34

T/F
Actin filaments are aligned parallel to the preprophase band during G2 of interphase

Back 34

True

Front 35

T/F
The phragmoplast consists of microtubules that, with actin filaments, direct the formation of the cell plate

Back 35

True

Front 36

T/F
One way in which genetic variation is produced in meiosis is through random orientation of chromosomes at metaphase II.

Back 36

False

Front 37

T/F
The number of cells produced varies with the type of cell division that occurs. At the conclusion of meiosis, two cells are produced while at the conclusion of mitosis, four cells are produced.

Back 37

False

Front 38

T/F
Prophase I of meiosis differs from prophase of mitosis because, in prophase of mitosis, there is pairing of homologous chromosomes and crossing-over occurs, and these two processes are not present in prophase I of meiosis.

Back 38

False

Front 39

T/F
In meiosis, anaphase I separates homologous chromosomes from one another while anaphase II separates sister chromatids from one another.

Back 39

True

Front 40

T/F
Two events that are always present during sexual reproduction are meiosis and fertilization.

Back 40

True

Front 41

Spindel fibers

Back 41

pull daughter chromosomes to opposite poles of the cell by the action of motor proteins and by shortening of kenetochore microtubules

Front 42

Meiosis

Back 42

produces either gametes or spores

Front 43

Which of the following is not true of mitosis

Back 43

Cells that differ genetically from one another and from the parent cell result from mitosis.

Front 44

Crossing over

Back 44

results in genetic recombination by recombining DNA inherited from both parents

Front 45

Metaphase of mitosis differs from metaphase I of meiosis in that in mitosis

Back 45

kinetochore microtubules extending from opposite poles of the cell attach to the two kinetochores of the chromosome in preparation for the separation of chromatids at anaphase.