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Multiple Choice Quiz
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1
Arabidopsis is an auxotrophic organism.
A)True
B)False
2
The genome of Arabidopsis has very little repetitive DNA.
A)True
B)False
3
The fertilized ovule of Arabidopsis contains diploid and triploid tissues.
A)True
B)False
4
The genome of Arabidopsis is about equal to the C. elegans genome
A)True
B)False
5
Spontaneous mutations in natural populations of Arabidopsis are not useful for laboratory study.
A)True
B)False
6
The HY4 gene product in Arabidopsis is a blue light sensor.
A)True
B)False
7
Arabidopsis information processing genes are homologous to genes found in yeast and mammals.
A)True
B)False
8
The ABC model of flower development describes sequential activation of A, B, and C genes.
A)True
B)False
9
The particular strain of Arabidopsis is its:
A)photomorphogenesis
B)vernalization
C)inflorescence meristem
D)apical meristem
E)ecotype
10
Flowering time can be changed through:
A)photomorphogenesis
B)vernalization
C)inflorescence meristem
D)apical meristem
E)ecotype
11
In Arabidopsis, _____________ gives rise to root and shoot tissue.
A)photomorphogenesis
B)vernalization
C)inflorescence meristem
D)apical meristem
E)ecotype
12
In Arabidopsis, _____________ gives rise to flower tissue.
A)photomorphogenesis
B)vernalization
C)inflorescence meristem
D)apical meristem
E)ecotype
13
Phytochromes and cryptochromes mediate:
A)photomorphogenesis
B)vernalization
C)inflorescence meristem
D)apical meristem
E)ecotype
14
A meristem that cannot produce other meristems indefinitely is referred to as:
A)determinate.
B)omnipotent.
C)indeterminate.
D)multimeric.
E)none of the above.
15
You have discovered an Arabidopsis mutant which has very elongated stems. Which of the following hormones might you apply to a wild-type plant to mimic this phenotype?
A)auxin
B)cytokinin
C)abscisic acid
D)gibberellins
E)ethylene
16
Which of the following is a reason for the scarcity of maternal-effect and early zygotic mutations in Arabidopsis?
A)many plant genes are represented by single copies
B)self-fertilization
C)development is not dependent on a large egg
D)all of the above
E)none of the above
17
What mutational agent would be most suitable for seeds of Arabidopsis?
A)T-DNA
B)ionizing radiation
C)transposable elements
D)intercalating agents
E)UV
18
Which of the following are environmental cues for flowering in Arabidopsis?
A)temperature
B)photoperiod
C)moisture
D)a & b
E)all of the above
19
You generate a null mutation in an Arabidopsis biosynthetic pathway, yet the adult mutant plant appears wild type. What is the most likely explanation?
A)photosynthesis provides all plant nutrients
B)mutations revert very quickly in Arabidopsis
C)presence of redundant genes
D)null allele is pseudogene
E)cotyledons supply missing nutrients
20
Which of the following is not a characteristic of Agrobacterium-mediated transformation as carried out in the laboratory?
A)plant cell-bacterium contact
B)T-DNA inserts at specific sites
C)drug resistance markers can be transferred
D)can be used to mutate genes
E)all are properties
21
Information gained from the study of Arabidopsis is only relevant to other plants.
A)True
B)False
22
Development in the root of a seedling is suppressed in the absence of light.
A)True
B)False
23
Development in the shoot apical meristem of a seedling is active in the absence of light.
A)True
B)False
24
A mutation in the AGAMOUS gene will produce flowers with sepals, petals, petals, sepals.
A)True
B)False
25
Mutations in LFY prevents the plant shoot from flowering.
A)True
B)False
26
AG is expressed in all 4 whorls of the flower
A)True
B)False
27
In most angiosperms, non-coding repetitive DNA makes up more than half of the genome.
A)True
B)False
28
Corn transposable elements which can operate in Arabidopsis are exemplified by:
A)T-DNA
B)Ac/Ds and Spm/dSpm
C)homeotic genes
D)plant hormones
E)photoperiod
29
Agrobacterium can transform plant cells by transferring:
A)T-DNA
B)Ac/Ds and Spm/dSpm
C)homeotic genes
D)plant hormones
E)photoperiod
30
Abscisic acid is an example of:
A)T-DNA
B)Ac/Ds and Spm/dSpm
C)homeotic genes
D)plant hormones
E)photoperiod
31
Tissue architecture is regulated in part by:
A)T-DNA
B)Ac/Ds and Spm/dSpm
C)homeotic genes
D)plant hormones
E)photoperiod
32
In Arabidopsis, _________ can influence timing of flowering.
A)T-DNA
B)Ac/Ds and Spm/dSpm
C)homeotic genes
D)plant hormones
E)photoperiod
33
Which of the following genetic techniques is utilized by Arabidopsis researchers?
A)insertional mutagenesis by Agrobacterium tumefaciens
B)tetrad analysis
C)Hfr mapping
D)P-element transposition
E)lambda phage
34
Mutations in GA1 causes which of the following?
A)dwarf stature
B)no sepals
C)no carpels
D)all of the above
E)none of the above
35
COP1 and PHYB are genes involved in:
A)germination
B)plant growth over long distances
C)flower development
D)light response
E)seed maturation
36
LEC is a gene involved in:
A)germination
B)plant growth over long distances
C)flower development
D)light response
E)seed maturation
37
Auxins and cytokinins are hormones involved in:
A)germination
B)plant growth over long distances
C)flower development
D)light response
E)seed maturation
38
Water is the principal environmental factor influencing:
A)germination
B)plant growth over long distances
C)flower development
D)light response
E)seed maturation
39
AP2, AG, and TFL1 are genes involved in:
A)germination
B)plant growth over long distances
C)flower development
D)light response
E)seed maturation
40
Which of the following is produced by the inflorescence meristem?
A)cotyledons
B)side shoots
C)roots
D)hypocotyl
E)none of the above





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