AIPMT-MAINS Botany Questions

How many organisms in the list given below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia

Read the following five statements (A - E) and answer as asked next to them. (A) In Equisetum the female gametophyte is retained on the parent sporophyte. (B) In Ginkgo male gametophyte is not independent. (C) The sporophyte in Riccia is more developed than that in Polytrichum. (D) Sexual reproduction in Volvox is isogamous. (E) The spores of slime molds lack cell walls. How many of the above statements are correct?

Which one of the following pairs is wrongly matched?

In the five-kingdom classification, Chlamydomonas and Chlorella have been included in:

Which one of the following structures is an organelle within an organelle?

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?

How many plants in the list given below have marginal placentation? Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin

Read the following four statements (A⁻D): (A) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane. (B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth. (C) Stamens in flowers of Gloriosa and Petunia are polyandrous. (D) Symbiotic nitrogen-fixers occur in free-living state also in soil. How many of the above statements are right?

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

Which one of the following generally acts as an antagonist to gibberellins?

As compared to a dicot root, a monocot root has:

For its action, nitrogenase requires:

Vernalisation stimulates flowering in:

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:

Cuscuta is an example of:

The second stage of hydrosere is occupied by plants like:

Green revolution in India occurred during:

Read the following four statements (A⁻D): (A) Colostrum is recommended for the new born because it is rich in antigens. (B) Chikengunya is caused by a Gram negative bacterium. (C) Tissue culture has proved useful in obtaining virus-free plants. (D) Beer is manufactured by distillation of fermented grape juice. How many of the above statements are wrong?

In genetic engineering, the antibiotics are used:

Which one of the following organisms is scientifically correctly named, correctly printed, according to the International Rules of Nomenclature and correctly described?

Which one of the following cellular parts is correctly described?

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres:

The idea of mutations was brought forth by:

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 sets of items in the options 1 - 4 are correctly categorised with one exception in it?

Consider the following four statements (a-d) and select the option which includes all the correct ones only. (a) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc. (b) Body weight-wise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day (c) Common button mushrooms are a very rich source of vitamin C (d) A rice variety has been developed which is very rich in calcium.

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?

Which one of the following is essential for photolysis of water?

In mitochondria, protons accumulate in the

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

Whorled simple leaves with reticulate venation are present in

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?

Function of companion cells is

Which one of the following is not considered as a part of the endomembrane system?

In Kranz anatomy, the bundle sheath cells have

Sweet potato is homologous to

Guttation is the result of

Biodiversity of a geographical region represents

At metaphase, chromosomes are attached to the spindle fibres by their