List of top Botany Questions

A eukaryotic cell is exposed to a chemical that inhibits the 5' capping of pre-mRNA. What is the most likely effect on translation?

The enzyme responsible for synthesizing RNA primers during DNA replication is -

Sequence the following events involved in a point mutation in DNA.
A. Alteration in the amino acid sequence of a protein.
B. Change in mRNA codon during transcription.
C. Substitution of a single nucleotide in the DNA sequence.
D. Possible disruption of protein function or structure.
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Specialised cells are generally found in the plant leaves which contain outgrowths of epidermal cell wall, made of calcium carbonate or silicon dioxide in a cellulose matrix are called as:

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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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

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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What is the primary function of Bt toxin in genetically modified crops like Bt Cotton?

The correct karyotype description of Patau Syndrome is ____________.

A plasmid vector contains a multiple cloning site (MCS) within the lac-Z gene. If foreign DNA is inserted into the MCS, what happens when competent cells are transformed with this plasmid and allowed to grow on a nutrient medium plate with X-gal and IPTG?

Sequentially arrange the steps involved in cryopreservation of plant cells in order of their occurrence.
A. Raising sterile tissue culture
B. Determination of viability
C. Freezing, Storage
D. Addition of cryoprotectants.
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Which one of the following is a correct example of Fruticose Lichen?

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

Which of the following is a characteristic feature of Bacterial Artificial Chromosome (BAC) vector?

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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Match the LIST-I with LIST-II

List-I (Family/Characteristic, etc.)	List-II (Species/Examples)
(A) Myrtaceae	(I) Psidium
(B) Hypanthodium inflorescence	(III) Fig
(C) Caryophyllaceae	(II) Carnation
(D) Asteraceae	(IV) Inula

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The genera which belongs to the family Characeae are:
A. Tolypella
B. Nitella
C. Nigella
D. Chara
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Match the LIST-I with LIST-II

LIST-I Class of Mutagens	LIST-II  Examples
A. Alkylating agent	III. Mustard gas
B. Base analog	IV. 5-Bromouracil
C. Intercalating agent	I. Acridine Orange
D. Deamination agent	II. Nitrous acid

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Paracytic type of stomata are distinctive feature of:

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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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:

What is the correct general scheme of the fungal succession on herbivore dung:
A. Basidiomycetes
B. Discomycetes
C. Phycomycetes
D. Pyrenomycetes
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Which of the following is a macrophyte?

Among the following ecosystems, which has the least Net Primary Production (NPP)?

Guttation occurs when: