AIPMT Mains Botany Class 12 Questions

Which one of the following is a wrong statement regarding mutations?

A test cross is carried out to:

Read the following four statements (A⁻D):

(A) In transcription, adenosine pairs with uracil.

(B) Regulation of lac operon by repressor is referred to as positive regulation.

(C) The human genome has approximately 50,000 genes.

(D) Haemophilia is a sex-linked recessive disease.

How many of the above statements are right?

What is the function of germ pore?

Which one of the following statements is wrong?

Plants with ovaries having only one or a few ovules, are generally pollinated by:

Sacred groves are specially useful in:

The rate of formation of new organic matter by rabbit in a grassland, is called:

Select the correct statement about biodiversity:

The domestic sewage in large cities: (1) has a high BOD as it contains both aerobic and anaerobic bacteria (2) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs) (3) When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen. (4) has very high amounts of suspended solids and dissolved salts

Which one of the following represents a palindromic sequence in DNA?

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because

Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?

The unequivocal proof of DNA as the genetic material came from the studies on a

What is common between vegetative reproduction and Apomixis?

Read the following statement having two blanks (A and B) 'A drug used for (A) patients is obtained from a species of the organism (B).' The one correct option for the two blanks is

Which one of the following pairs is wrongly matched while the remaining three are correct?

Biodiversity of a geographical region represents

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

Test cross in plants or in Drosophila involves crossing

The logistic population growth is expressed by the equation

In angiosperms, functional megaspore develops into

The breakdown of detritus into smaller particles by earthworm is a process called

Consider the following statement (A)⁻(D) each with one or two blanks. (A) Bears go into _______ (1) _______ during winter to _______ (2) _______ cold weather (B) A conical age pyramid with a broad base represents _______ (3) _______ human population (C) A wasp pollinating a fig flower is an example of _______ (4) _______ (D) An area with high levels of species richness is known as _______ (5) _______ Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character

Which one of the following is most appropriately defined?

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the

In Antirrhinum two plants with pink flowers were hybridized. The F₁ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by RR, and white by rr genes.

A cross in which an organism showing a dominant phenotype is crossed with the recessive parent in order to know its genotype is called

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible?

The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because :

The lac operon consists of

Vegetative propagation is Pistia occurs by

Which of the following representations shows the pyramid of numbers in a forest ecosystem?

The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join

Study the pedigree chart given below: What does it show?

T.O. Diener discovered a:

A fruit developed from hypanthodium inflorescence is called:

Which one of the following has maximum genetic diversity in India?

Which one of the following plants is monoecious?

Removal of introns and joining the exons in a defined order in a transcription unit is called:

Semiconservative replication of DNA was first demonstrated in:

A country with a high rate of population growth took measures to reduce it. The Figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them:

Which one of the following pairs is wrongly matched?

Vegetative propagation in mint occurs by:

Select the incorrect statement from the following:

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a 'triplet'?

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

An example of a seed with endosperm, perisperm, and caruncle is:

Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of: