AIPMT-MAIN Botany Questions
50 questions
In DNA, the complimentary bases are
Select one of the following important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
Which one of the following phyla is correctly matched with its two general characteristics?
Cellulose is the major component of cell walls of
Vacuole in a plant cell
Polysome is formed by
Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a - e) make it useful as a storage material? a. Easily translocated b. Chemical non-reactive c. Easily digested by animals d. Osmotically inactive e. Synthesized during photosynthesis The useful properties are
Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct w.r.t. the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
In germinating seeds fatty acids are degraded exclusively in the
The two sub-units of ribosome remain united at a critical ion level of
Thron of Bougainvillea and tendril of cucurbita are example of
Haploids are more suitable for mutation studies than the diploids. This is because
Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/ linkage?
In the DNA molecules
The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in
The C₄ plants are photosynthetically more efficient than C₃ plants because
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
Dry indehiscent single-seeded fruit formed bicarpellary syncarpous inferior ovary is
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
Vascular tissues in flowering plants develop from
In leaves of C₄ plants malic acid synthesis during CO₂ fixation occurs in
Importance of day length in flowering of plants was first shown in
Endosperm is consumed by developing embryo in the seed of
Nitrogen fixation in root nodules of Alnus is brought about by
The energy releasing process in which the substrate is oxidised without an external electron acceptor is called
Replum is present in the ovary of flower of
The fleshy receptacle of syconus of fig encloses a number of
Electrons from excited chlorophyll molecule of photosystem II are accepted first by
Which one of the following is resistant to enzyme action?
The length of different internodes in a culm of sugarcane is variable because of
Which cells in the embryo sac have haploid chromosomes?
What does the filiform apparatus do at the entrance into ovule?
Unisexuality of flowers prevents
Quercus species are the dominant component in
About 70% of total global carbon is found in
Which one of the following is not observed in biodiversity hotspots?
World summit on Sustainable Development (2002) was held in
The slow rate of decomposition of fallen logs in nature is due to their
The table below gives the populations (in thousands) of ten species (A - J) in four areas (a - d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows
Consider the following four statements (a - d) about certain desert animals such as kangaroo rat. (a) They have dark colour and high rate of reproduction and excrete solid urine (b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (c) They feed on dry seeds and do not require drinking water (d) They excrete very concentrated urine and do not use water to regulate body temperature Which two of the above statements for such animals are true?
Bacterial leaf blight of rice is caused by a species of
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
Trichoderma harzianum has proved a useful microorganism for
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
Cry I endotoxins obtained from Bacillus Thuringiensis are effective against
The linking of antibiotic resistance gene with the plasmid vector became possible with
Which one of the following proved effective for biological control of nematodal disease in plants?
Consider the following four measures (a - d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common (a) Spray with Bordeaux mixture (b) Control of the insect vector of the disease pathogen (c) Use of only disease-free seeds (d) Use of varieties resistant to the disease Which two of the above measures can control the disease?