List of top Botany Questions

To increase the amount of mugineic acid, rice plants were transformed (using Agrobacterium) with a fragment of barley genomic DNA containing two naat genes; naat-A and naat-B, encoding the subunits of the enzyme

Cytokinin treatment extends the life span of detached Xanthium leaves by delaying chlorophyll and protein degradation. This experiment is called:

In angiosperms, which process involves the fusion of male gamete with the egg cell?

The example of facultative CAM plant which carries on C₃ metabolism under unstressed conditions is:

In which specific region of the chloroplast, does Calvin cycle occurs?

What is the role of Gibberellic acid in plants?

What effect does the hypermethylation of promoter regions typically have on gene expression?

Which of the following hormones is synthesized from methionine?

Identify the correct sequence of steps in a dihybrid cross to test Mendel's Law of Independent Assortment
A. Selection of two traits in the parent generation.
B. Crossing of pure - breeding parents.
C. Analysis of phenotypic ratios in the F₂ generation.
D. Observations of gamete combinations in the F₁ generation.
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Which of the following statements are correct regarding protein synthesis in eukaryotes?
A. 3'-Cap of mRNA present.
B. Ribosomes of 80S type dissociate into 40S and 60S subunits.
C. Translation is not simultaneous with transcription.
D. Initiation codon of mRNA is recognised by anticodon of Met-tRNA.
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During sexual reproduction in Rhizopus, projections from two compatible hyphae are attracted towards each other. These hyphae are called -

Match the LIST-I with LIST-II

LIST-I Minerals	LIST-II  Deficiency Symptoms in Plants
A. Calcium	III. Necrosis of young meristematic regions such as root tips or young leaves
B. Zinc	IV. Display of rosette habit
C. Manganese	I. Intervenous chlorosis associated with the development of small necrotic spots
D. Nickel	II. Accumulation of Urea in the leaves

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The correct karyotype description of Patau Syndrome is ____________.

Which among the following is responsible for imparting blue and purple colour in some type of berries?

What is the correct sequence of Transmembrane multiprotein complexes of the electron transport chain during respiration?
A. Succinate dehydrogenase
B. NADH dehydrogenase
C. Cytochrome c oxidase
D. Cytochrome bc1 complex
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Treating chromatin with a non specific nuclease yields a segment of about 168 bp which is bound to 9 histone molecules (H2A, H2B, H3, H4 and H1). This whole structure is known as:

Selaginella is also known as:

In which of the following molecular markers, polymerase chain reaction (PCR) is required?
A. Restriction Fragment Length Polymorphism (RFLP)
B. Random Amplified Polymorphic DNAs (RAPD)
C. Amplified Fragment Length Polymorphism (AFLP)
D. Sequence-Tagged Sites (STSs)
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Which sequence of steps is correct in the development of a genetically modified (GM) crop?
A. Insertion of the gene into the vector.
B. Identification of a desired gene.
C. Selection and screening of transformed plants.
D. Transfer of the vector into a plant cell.
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Which of the following is a characteristic feature of Bacterial Artificial Chromosome (BAC) vector?

Mesosome is a specialized and differentiated form of __________.

Which of the following mutations is most likely to contribute to the development of cancer?

If the number of chromosomes in the egg cell of a plant is 8, then what would be the number of chromosomes in its endosperm?

Which of the following amino acid is basic in nature?

Match the LIST-I with LIST-II

LIST-I Gene Interaction	LIST-II  Dihybrid ratio for a single character
A. Duplicate dominant epistasis	I. 9:7
B. Duplicate recessive epistasis	II. 15:1
C. Recessive epistasis	III. 9:3:4
D. Dominant & Recessive Epistasis	IV. 13:3

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