List of top Botany Questions on Molecular Biology

During the expression of Lac operon, the repressor protein binds to

What would be the nitrogen base sequences in the m-RNA formed by the given DNA segment.
3' ATGCAGCATGACCGA 5'
5' TACGTCGTACTGGCT 3'

निम्नलिखित में से कौन RNA polymerase II (यूकेरियोट) mRNA का संश्लेषण करता है?

Which of the following statements about lac-operon is correct ?

Arrange the meiotic stages in correct sequence.

When 54 molecules of \(CO_2\) are fixed by RuBisCo in a \(C_3\) plant, number of G3-P exported to cytosol and number of G3-P participating in regeneration respectively are:

Glycogen is a homopolymer made up of these units.

Characters related to ovule in Helianthus. \[ \begin{aligned} \text{I. Inverted} \\ \text{II. Curvature angle is }180^\circ \\ \text{III. Unitegmic} \\ \text{IV. Micropyle lies close to funicle} \end{aligned} \]

Match the following (List-I: Organism; List-II: Use in Biotechnology).

These seeds cannot germinate and establish without the presence of mycorrhizae are

Transketolase: \(2A + 2G\text{-}3P \rightarrow 2\) xylulose-5-phosphate \(+ 2B\). In the above reaction A and B are respectively

Red eyed plain thorax Drosophila flies were crossed with pink eyed, striped thorax flies. \(F_{1}\) generation flies were test crossed with recessive flies. \(F_{2}\) generation result is as follows. \[ \text{Red eyed plain thorax}=80 \] \[ \text{Red eyed striped thorax}=16 \] \[ \text{Pink eyed plain thorax}=12 \] \[ \text{Pink eyed striped thorax}=92 \] Find out the percentage of recombinants.

Zygomorphic flowers showing imbricate aestivation

Choose the correct statements among the following: A) Transcriptase catalyzes the polymerization in 5' $\rightarrow$ 3' direction only and the 3' $\rightarrow$ 5' strand is referred to as template. B) The chemical method of Khorana was instrumental in the synthesis of homopolymers of RNA. C) tRNA amino acid acceptor end has bases complementary to the code. D) 23s r-RNA in bacteria is a ribozyme.

Assertion (A): The genetic material should be stable enough not to change with different stages of life cycle, age, with change in physiology of organism. Reason (R): stability of genetic material is clearly evidenced with transforming principle.

Choose the incorrect statement of the following:

Arrange the different phases of photosynthesis in the correct sequence. A. Capturing the solar energy B. Formation of higher-energy organic intermediates C. Splitting of water and release of oxygen D. Fixation of CO2 into 3-phosphoglycerate E. Reduction of phosphoglycerate into glyceraldehyde-3-phosphate. Choose the correct answer from the options given below:

As regards transcription, the prototype enhancer discovered in the animal virus SV40 is a sequence of __________ base pairs.

The DNA sequence that determines/indicates where a genetic sequence can be read and decoded, is called ____.

The eukaryotic signal recognition particle consists of ____.

Which one is known as ochre ?

Which one is a structural gene in tryptophan operon ?

The DNA that shows left-handed coiling, contains 12 base pairs per turn and has a pitch of 69 Å is known as __________ DNA.

In general, the smallest RNA is __________.