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Gen Bio 1 > exam 3 (ch 9-12) > Flashcards

exam 3 (ch 9-12) Flashcards

1
Q

which of the following is the source of electrons for the light reactions

a:h2o
b:c6h12o6
c:co2
d: nadph

A

h2o

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2
Q

a cell that completed the cell cycle without undergoing cytokinesis would

a: be diploid
b: have two nuclei
c: be haploid
d: not have completed anaphase

A

have two nuclei

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3
Q

which of the following terms best describes the role of certain metal ions and coenzymes?

a:reactants
b: intermediates
c:cofactors
d:products

A

cofactors

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4
Q

when a neuron responds to a particular neurontransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?
a:relay molecule
b: transducer
c: signal molecule
d: response molecule

A

signal molecule

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5
Q

what name is given to a discrete packet of light?

a: phaser
b:wavelength
c:photon
d: spectrum

A

photon

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6
Q

plant cell cytokinesis differs from animal cell cytokinesis because____

a: plant cells produce more daughter cells
b: plant cells lack the telophase of mitosis
c: animal daughter cells are haploid
d: plant cells have a rigid cell wall and animal cells do not

A

plant cells have a rigid cell wall and animal cells do not

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7
Q

which of the following is NOT involved in the light dependent reactions?

a: ATP
b: thylakoids
c: chlorophyll
d: stroma

A

stroma

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8
Q

a product of glycolysis is______

a: lactic acid
b:ethyl alcohol
c: NAD+
d: pyruvic acid

A

pyruvic acid

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9
Q

what is the function of stomata?
a: fermentation
b: water absorption
c: kelvin cycle
d: gas exchange

A

gas exchange

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10
Q

aerobic respiration generates about ___ ATP from one glucose
a: 2
b: 6
c:36
d:48

A

36 or 38

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11
Q

protein kinase is an enzyme that

a: functions as a second messenger molecule
b: serves as a receptor for various signal molecules
c: activates or inactivates other proteins by adding a phosphate group to them
d: produces second messenger molecules

A

activates or inactivates other proteins by adding a phosphate group to them

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12
Q

aerobic means with _________

a: oxygen
b: carbon dioxide
c:atp
d: light

A

oxygen

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13
Q

under arid conditions, c4 lants fix carbon dioxide more efficiently than c3 plants because c4 plants_____

a: utilize rubisco
b: have chloroplasts concentrated in mesophyll cells
c:decrease the rate at which carbon dioxide diffuses into the plant from the atmosphere
d: use ATP to fix carbon dioxide

A

use atp to fix carbon dioxide

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14
Q

genes are carried on________

a: chromosomes
b: centriosome
c: chaisma
d: nuclei

A

chromosomes

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15
Q

scaffolding proteins are_________

a: microtubular protein arrays that allow lipid-soluble hormones to get from the cell membrane to the nuclear pores
b:large molecules to which several relay proteins attach to facilitate cascade effects
c: relay proteins that orient receptors and their ligands in appropriate directions to facilitate their complexing
d:proteins that can reach into the nucleus of a cell to affect transcription

A

large molecules to which several relay proteins attach to facilitate cascade effects

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16
Q

which of the following triggers the cell’s passage past the G2 checkpoint into mitosis?

a:PDGF
b:MPF
c:cyclin
d: Cdk

A

MPF

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17
Q

The spread of cancer from one site to others in the body is known as:

a: a benign tumor
b: metastasis
c:a malignant tumor
d: remission

A

metastasis

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18
Q

what is the primary function of the calvin cycle?

a: use nadph to release carbon dioxide
b:split water and release oxygen
c:transport RuBP out of the chloroplast
d: synthesize simple sugars from carbon dioxide

A

synthesize simple sugars from carbon dioxide

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19
Q

one of the major categories of redceptors in the plasma membrane reacts by forming dimers, adding phosphate groups, and then activating relay proteins. which type does this?

a: G protein-coupled reactors
b:ligand gated ion channels
c: steroid receptors
d: receptor tyrosine kinase

A

receptor tyrosine kinases

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20
Q

respiration__________, and cellular respiration________

a: produces atp, is gas exchange
b: is gas exchange, produces atp
c: produces glucose, produces oxygen
d: uses glucose, produces glucose

A

is gas exchange, produces atp

21
Q

the last stage of one completed turn of the calvin cycle involves_______

a:G3P production
b: reduction of CO2
c: regeneration of RuBP
d: oxidation of CO2

A

regeneration of RuBP

22
Q

during which phase of mitosis do the chromatids become chromosomes

a:telophase
b:anaphase
c: prophase
d:metaphase

A

prophase

23
Q

the first electron acceptor of cellular respiration is____

a:CO2
b:O2
c:ATP
d:NAD+

A

NAD+

24
Q

The cell cycle results in the production of_______

a: two diploid cells each with the same amount of genetic material and information
b:four diploid cells each with the same amount of genetic material and information
c: two diploid cells, each with the same amount of genetic material but different genetic information
d: four diploid cells, each with the same amount of genetic material but different genetic information

A

two diploid cells each with the same amount of genetic material and information

25
Q

how many molecules of glucose are produced by each cycle of the light reaction

a: two
b: zero
c: four
d: siz

A

zero

26
Q

which of the following is a stage of mitosis

a: cytokinesis
b:meiosis
c: interphase
d:telophase

A

telophase

27
Q

binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite ends of the membrane

a:receptor tyrosine kiknase
b:g protein-coupled receptor
c:ligand gated ion channel
d: intracellular receptor

A

ligand gated ion channel

28
Q

the final electron acceptor of aerobic respiration is:

a: carbon dioxide
b: atp
c:oxygen
d:lactic acid

A

oxygen

29
Q

what does it mean to say that a signal is transduced?

a: the signal enters the cell directly and binds to a receptor inside
b:the physical form of the signal changes from one form to another
c: the signal is amplified, such than even a single molecule evokes a large response
d:the signal triggers a sequence of phosphor\ylation events inside the cell

A

the physical form of the signal changes from one form to another

30
Q

The final electron acceptor of aerobic respiration is ______

a: atp
b:glucose
c:NADP+
d:chlorophyll a

A

NADP+

31
Q

Which of the following equations best summarizes photosynthesis?

a: 6CO2 + 6H2O+6O2-> C6H12O6
b: 6CO2+6H2O-> C6H12O6+6O2
c:6CO2+6O2->C6H12O6+6H2O
d:C6H12O2+6O2->6CO2+6H2O

A

6CO2+6H2O-> C6H12O6+6O2

32
Q

The genetic material is duplicated during____ of the cell cycle

a: the mitotic phase
b:G1
c: the s phase
d: G2

A

the s phase

33
Q

neurons and some other specialized cells divide infrequently because they

a: no longer have active nuclei
b:have entered into G0
c: can no longer bind Cdk to cyclin
d: show a drop in MPF concentration

A

have entered into G0

34
Q

which part of cellular respiration produces the most NADH?

a:electron transport chain
b:citric acid cycle
c:hydrogenation
d: glycolysis

A

citric acid cycle

35
Q

where are photosystems located

a: inner chloroplast membrane
b:thylakoid membrane
c:chlorophyll
d: cristae

A

thylakoid membrane

36
Q

how many chromosomes can a gamete posses as a result of nondisjunction?

a:n+1 or n-1
b: 2n+1 or 2n-1
c: n+1 only
d: 2n-1 only

A

n+1 or n-1

37
Q

adenylyl cyclase has the opposite effect of which of the following?

a:protein kinase
b:protein phosphate
c:phosphodiestrase
d:phosphorlyase

A

phosphodiestrase

38
Q

a karyotype (a chromosome display) would be unable to determine

a: down syndrome
b:eye color
c: sex
d:polyploidy

A

eye color

39
Q

photosynthesis contributes to plant growth by:

a:taking in carbon dioxide and marking carbohydrates
b:taking in oxygen and making wood
c:converting sugar to oxygen and water
d:synthesizing carbon dioxide and making cellulose

A

taking in carbon dioxide and marking carbohydrates

40
Q

sister chromatids are joined at the:

a: chomatin
b:spindle
c:centromere
d:centrosome

A

centromere

41
Q

which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells

a:hormonal signaling
b:autocrine signaling
c: paracrine signaling
d: synaptic signaling

A

paracrine signaling

42
Q

the ultimate source of energy in food is:

a:producers
b:atp
c: consumers
d: the sun

A

the sun

43
Q

which wavelength of light is the least useful to your plants growth

a: 500nm
b:550nm
c:650nm
d:750nm

A

750nm

44
Q

which of these events occurs during anaphase

a: cytokinesis occurs
b:nucleoli reappear
c:chromosomes align on the midline of the cell
d: centromeres divide

A

centromeres divide

45
Q

a steroid hormone binds to an intracellular receptor. when it does the resulting complex is able to do which of the following? why?

a: open channels in the membrane for other substances to enter
b:open channels in the nuclear envelope for cytoplasmic molecules to enter
c: mediate the transfer of phosphate groups to/from atp
d:act as a transcription factor in the nucleus

A

act as a transcription factor in the nucleus

46
Q

what compound directly provides energy for cellular work

a:c6h12o6
b:atp
c:rubisco
d: dna

A

atp

47
Q

c4 plants conserve water by

a: shuttling co2 from the calvin cycle to the water splitting photosystem
b: incorporating co2 into RuBP
c: growing very deep roots
d: keeping their stomata closed most of the time

A

keeping their stomata closed most of the time

48
Q

which of the following occurs during interphase

a:chromatin becomes tightly coiled
b:dna is synthesized
c:sister chromatids separate
d:the mitotic spindle forms

A

dna is synthsized

Gen Bio 1 (27 decks)

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