AIIMS Botany Class 12 Questions

Assertion : Complementary base pairing occurs in DNA. Reason : This is because adenine is combined with cytosine with a double bond and guanine is combined with thymin with a triple bond.

Chimeric DNA is

Gene library or DNA library has collection of

Identify a, b, and c

1. Match the column I and II

Select the correct option regarding genetic code of Glycine

Genes on same chromosome can be

Who discovered DNA fingerprinting

Which is similar term to Hybrid vigour?

Which of the following switch off lac operon

m-RNA is formed by

Percentage of (G + C) is

Arrange them on the basis of increasing size:

The process of removal of anther from the flower bud before it dehisces is called as

Which of the following is a sex linked character

Select the correct option w.r.t. Age pyramids.

The genetic code of proline are :

Match the column

(I) (II) (III)

The coding strand of DNA is : 5′AATTCAAATTAGG₃′ What is the sequence of mRNA?

Match the following:

The genetic codes of arginine are:

Correct sequence for Alanine code:

Identify a, b and c

DNA polymerase links nucleotide by forming which type of bond:

Which mutation causes change in allele?

Select the wrong statement:

Which is not possible by mutation:

Assertion: Down syndrome, Klinfelter syndrome and Turner syndrome are chromosomal disorders.

Reason: In Klinfelter syndrome females are sterile.

Match the Column-I with II

Choose the correct statement.

Match the correct column

Assertion : In eukaryotes, both intron and exon are transcribed to form hnRNA Reason : Splicing is required in prokaryotes

Assertion: Parthenocarpy involves formation of seedless fruit. Reason: Apomixis occurs without fertilization

Identify the parts labeled in the diagram.

Assertion: In eukaryotes, transcription occurs in nucleus Reason: In bacteria, transcription and translation occurs in cytoplasm.

Which statement is correct for apomixes?

Assertion: Fig and wasp cannot complete their life cycle without each other. Reason: It is mutualistic relationship.

Assertion: In commensalism, one organism is benefitted and other is unaffected Reason: Cattle egret bird and cattle is an example of commensalism

Which of the following is correct about biogas –

Blood group of the father is A and blood group of mother is B. Then predict the blood group of the progeny -

Mark the incorrect statement for inbreeding

Assertion : During the process of photosynthesis amount of organic matter synthesized by producers per unit time and per unit area is referred to as net primary productivity. Reason : Due to abundance of sunlight primary productivity is usually high and sustained throughout the year in temperate areas.

Mark the correct one

Assertion: Selaginella&Salvinia are homosporous.

Reason: In pteridophyte, Lycopodium is precursor of seed habit

Assertion: Phenylketonuria, Haemophilia and sickle cell anemia are genetic disorders

Reason: In phenylketonuria the person has a non-functional enzyme for the conversion of phenylalanine to tyrosine.

Haploid cultures can be obtained by culturing:

10% law of energy transfer was given by

Assertion: The pre-pollination growth of male gametophyte occurs inside the microsporangium whereas the rest of the growth occurs over the female reproductive organs.

Reason: Growth of the entire female gametophyte occurs inside the megasporangium.

Assertion: The uptake of DNA during transformation is an active, energy requiring process. Reason: Transformation occurs only in those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.