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Bio Exam 2 > BIO EXAM part 2 > Flashcards

BIO EXAM part 2 Flashcards

part 3

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Biology 101 flashcards
1
Q

what gene regulation

A

control of gene expression: self regulating

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2
Q

three forms of gene regulatiom

A

transcription factors
Micro RNA with Mnra
Alternative Splicing

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3
Q

what are Introns

A

noncoding sequences

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4
Q

exons

A

sequence expressed as proteins

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5
Q

Life Cycle of an Angio Sperm
(see emily over polluted my microscope)

A

Microspores
megaspores
Pollen
One Sperm
Embryo
Seed Grows

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6
Q

transpiration

A

water loss by diffusion or evaporation

creates negative pressure thay pulls water molecules bound by cohesion from roots to the leaves

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7
Q

LArger leaf size

A

more light captures but more water loss (tropical environments)

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8
Q

small leafs size

A

less light capture but less water loss (dessert/ Temperate Forest?

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9
Q

Know the different parts of a flower

A
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10
Q

spal

A

protects developing flower

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11
Q

petals

A

attract pollinators

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12
Q

carpel

A

female reproductive parts
stigma
stile
ovary

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13
Q

Stamen

A

Male reproductive parts
filament
anther pollen production

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14
Q

Angiosperm Pollen dispersed

A

birds bees wind

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15
Q

what is pollination

A

the transfer of pollen from male anther to female stigma

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16
Q

different parts of a leaf
stomata
chloroplast
thylakoids
stroma

A

stomata: Porespores on the leaf where gas exchange occurs
Chloro: organelles in plants alage where photosynthesis
Thyla: membranes w
Stroma: fluid inside chloroplast

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17
Q
A
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18
Q

Stomata opens

A

O2 and H20 release
Co2 absorbed

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19
Q

light reactions products

A

nadph atp

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20
Q

light reactants’

A

water and sunlgiht

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21
Q

light reaction location

A

thylakoid to power calvin cycle

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22
Q

what are phtons

A

tiny packets of energy determines energy level

23
Q

chlorophyll a
chlorophyll b
caretoniouds

A

red blue violet
blue red orange
blueviolet green

24
Q

What undergo meiosis?

A
25
Q

what ceils undergo mitosis?

A
26
Q

What separates dunn)

A
27
Q

which contains the anti codon

A

Transfer trna

28
Q

which enters the plant through stomata?

A

water and

29
Q

Which of the following best describes the role of
water in photosynthesis?
a. Water acts as the final electron acceptor
b. Water diffuses through the thylakoid membrane
through ATP synthase
c. Water is a byproduct of photosynthesis
d. Water donates electrons to Photosystem II
e. Water transports electrons to the Calvin Cycle
?

A
30
Q

Which of the following enter the plant through the
stomata?
a. Carbon dioxide
b. Oxygen
c. Water
d. Light
e. More than one of the above

A
31
Q

Which of the following best describes the role of
water in photosynthesis?
a. Water acts as the final electron acceptor
b. Water diffuses through the thylakoid membrane
through ATP synthase
c. Water is a byproduct of photosynthesis
d. Water donates electrons to Photosystem II
e. Water transports electrons to the Calvin Cycle

A

2H20—–>4E—->4H—->O2

32
Q

Which of the following best describes the role of
the light reactions of photosynthesis?
a. Energy from light used to convert glucose to ATP
b. Energy from light is used to convert carbon dioxide to
glucose
c. Energy from light is used to create ATP and NADPH
d. Rubisco is used to convert carbon dioxide to glucose
e. Rubisco is used to convert water to oxygen
Check Your Understanding

A
33
Q

C3, C4, and CAM Plants
C3 C4 CAM
Photorespiration High Low Low
CO2 Fixation Rubisco _________________ Pep carboxylase
Stomata
(day/night) Open/close Open/close ________/_______
Advantage Efficient use of ATP Water conservation Water conservation
Disadvantage Photorespiration Requires more energy Require more energy,
Slow growth
Examples Most plants Sugarcane, corn, grass Pineapple, cacti,
succulents

A
34
Q

Which of the following are not one of the characteristics of
monocots?
a. Flower parts in multiples of threes
b. Single cotyledon
c. Taproot
d. Parallel veins in the leaves
e. More than one of the above are not
characteristic of monocots

A
35
Q

Which of the following parts of the flower are responsible for
the production of pollen?
a. Stigma
b. Anther
c. Style
d. Ovary
e. Filament

A
36
Q

True or False: Gametes are the only cells within the human
body that have two sets of chromosomes
True or False: Most of the DNA found in humans codes for
proteins
True or False: Adenine always binds with Thymine

A

1 F
2F
3T

37
Q

A section of DNA that codes for a specific protein is known
as ___________.
a. chromatin
b. a genome
c. a chromosome
d. a gene
e. a nucleotide

A

D

38
Q

A section of DNA that codes for a specific protein is known
as ___________.
a. chromatin
b. a genome
c. a chromosome
d. a gene
e. a nucleotide

A
39
Q

which of the following are responsible for unwinding the
DNA to form two complementary strands?
a. Histones
b. Helicase
c. DNA polymerase
d. Chromatin
e. Okazaki fragments

A
40
Q

Which of the following are not one of the characteristics of
monocots?
a. Flower parts in multiples of threes
b. Single cotyledon
c. Taproot
d. Parallel veins in the leaves
e. More than one of the above are not
characteristic of monocots

A

c

41
Q

Which of the following parts of the flower are responsible for
the production of pollen?
a. Stigma
b. Anther
c. Style
d. Ovary
e. Filament

A

b

42
Q

Explain the cohesion-tension hypothesis.

cohesion+tension= water transport

A

as water evaporates from leaves a process known as transpiration v creates a negative tension or suction that pulls water up from the roots through the xylem

43
Q

True or False: Gametes are the only cells within the human
body that have two sets of chromosomes

True or False: Most of the DNA found in humans codes for
proteins

True or False: Adenine always binds with Thymine

A

1,T

2 F

3 t

44
Q

A section of DNA that codes for a specific protein is known
as ___________.
a. chromatin
b. a genome
c. a chromosome
d. a gene
e. a nucleotide

A

d

gene—-protein

45
Q

Which of the following are responsible for unwinding the
DNA to form two complementary strands?
a. Histones
b. Helicase
c. DNA polymerase
d. Chromatin
e. Okazaki fragments
Check Your Understanding

A

b

46
Q
  1. True or False: Sex cells are diploid
  2. True or False: Humans have a total of 46 chromosomes
  3. True or False: The purpose of meiosis is to create
    genetically identical daughter ce
A

1 f

2.t

3f

prophase 1

47
Q

Check you Understanding
4. Crossing over occurs during which of the following
phases of meiosis?
a. Metaphase II
b. Prophase I
c. Anaphase I
d. Metaphase I
e. Prophase II

A

b

48
Q

Sister chromatids pull apart during which of the following
phases?
a. Anaphase of Mitosis
b. Metaphase of Meiosis I
c. Anaphase of Meiosis II
d. Metaphase of Mitosis I
e. More than one of the above

A

mitosis and meiosis

anaphase

e

49
Q

rue or False: DNA replication and RNA synthesis both use the
same polymerase to copy the DNA
2. True or False: Transcription takes places in the nucleus, while
translation occurs in the cytoplasm
3. True or False: Transfer RNA (tRNA) carries the copied DNA out of
the nucleus where it binds with a ribosome
4. True or False: Different codons can code for the same amino acid

A
  1. f

2 t

3 f

4 t

50
Q

Which of the following contains the anti-codon?
a. Ribosomal RNA
b. Transfer RNA
c. DNA
d. Messenger RNA
Check your Understanding

A

b

51
Q

At which of the following binding sites are the amino
acids linked together?
a. A-site
b. E-site
c. P-site
d. T-site

A

c

52
Q

True or False: All mutations result in an altered protein
2. True or False: All genes are constantly being transcribed
and translated
3. True or False: A majority of the corn, soybeans, and
cotton grown in the U.S has been genetically
modified

A
  1. f
    2f
    3t
  2. c
53
Q

. Which of the following is not one of the forms of gene
regulation?
a. Micro-RNA
b. Transcription factors
c. Mutations
d. Alternative splicin

A

c

54
Q

Which of the following mutations are the result of an
addition or deletion of a nucleotide?
a. Silent mutation
b. Missense mutation
c. Nonsense mutation
d. Frameshift mutatio

A

d

Bio Exam 2 (7 decks)

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