This set of Plant Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Flower Development”.
1. Which of the following is an alternative term used to denote flowering plants?
a) Ferns
b) Mosses
c) Angiosperm
d) Gymnosperms
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Explanation: Flowering plants are also known as Angiosperms or Anthophyta. This variety of plants produce flowers and bear their seeds in fruits. The flowering plants are further categorized into two classes, namely Monocots and Dicots.
2. Inflorescence meristem produce large leaves.
a) True
b) False
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Explanation: The given statement is false. Inflorescence meristem generally produces small leaves, after which it gives rise to floral meristem that eventually results in flower development. The floral meristem undergoes a series of steps before it completely develops into a flower.
3. What is the full form of GRN?
a) Growth Regulatory Network
b) Gene Regulatory Network
c) Growth Redirected Network
d) Gene Redirected Network
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Explanation: GRN is the abbreviated form of Gene Regulatory Network. It is composed of interactive genes and their products(proteins) which accurately controls different phases of flower development. Most of the genes in the floral GRN belong to extremely conserved gene families.
4. Which model represents the presence of genes and its role in the development of floral organs?
a) Light and Hormone mediated development model
b) Plant Simulation model
c) Cytochrome model
d) ABC model
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Explanation: The ABC model of flower development represents the presence of genes that regulate the development of floral organs in angiosperms. The genes are referred to as class A genes, class B genes and class C gene. These genes are responsible for the growth and development of floral organs.
5. Which of the following statement is true about florigen?
a) It is a hormone-like molecule produced in flowers
b) It is a hormone-like molecule produced in leaves
c) It is a non-flowering hormone
d) It causes partial mutation in plants
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Explanation: Flowering hormone or commonly known as florigen, is a hormone-like signaling molecule that is involved in controlling and inducing flowering in plants. Florigen is produced in the leaves, and prominently acts in the apical meristem of buds and other growing tips.
6. What do you mean by the term pistil?
a) Outermost part of a female flower
b) Outermost part of a male flower
c) Female reproductive organ of a flower
d) Male reproductive organ of a flower
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Explanation: Pistil is the female reproductive organ of a flower, whereas the male reproductive organ is the stamen. The Pistil is positioned in the innermost part of a female flower which can be differentiated into stigma, style and ovary.
7. Which of the following is not a transcription factor?
a) ZDF proteins
b) AP2-like proteins
c) LFY-like proteins
d) MADS-domain
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Explanation: The transcription factors that encodes with genes include AP2-like proteins, LFY-like proteins and MADS-domain. These transcription factors regulate the growth process in plants and also assist in the floral development process.
8. The floral meristem is differentiated into four integral structures.
a) True
b) False
View Answer
Explanation: The given statement is true. The floral meristem is differentiated into four integral structures. i.e., sepal, petal, stamen and carpel that are formed in whorl 1, whorl 2, whorl 3 and whorl 4 of the flower which are each responsible for the development of sepal, petal, stamen and carpel.
9. Which of the following statement is true regarding cross pollination?
a) Cross pollination results in weaker plants
b) It is also called as allogamy
c) In cross pollination, the pollen is transported from the stigma to the stamen of a different flower
d) Pollens are not wasted in this type of pollination
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Explanation: Cross pollination, often, results in stronger plants. It is also termed as allogamy. Cross pollination occurs when pollen is transported from the stamen of a flower in one plant to the stigma of a flower on another plant of the same species.
10. What is the correct expansion of the acronym TCP?
a) Teosinte branched1, Cycloidea, proliferating cell factor
b) Teosinte branched2, Cycloidea, proliferating cell factor
c) Teosinte branched3, Cycloidea, proliferating cell factor
d) Teosinte branched4, Cycloidea, proliferating cell factor
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Explanation: The correct expansion for the acronym TCP is Teosinte branched1, Cycloidea, proliferating cell factor. These genes play an important role as a plant-specific transcription factor. They not only regulate cell proliferation and differentiation, but also significantly impacts the growth of lateral organs.
Sanfoundry Global Education & Learning Series – Plant Biotechnology.
To practice all areas of Plant Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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