In order to produce amino acids from methane how many substituents should occupy the valency positions of the carbon?
Folding of inner membrane of mitochondria are called
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Solution
Cristae are finger like process projecting inwards.
Keystone species in an ecosystem are those
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Solution
The keystone species in an ecosystem are those who are the main contributors to the ecosystem.
Which of the following is the application of vernalization ?
The electron carrier molecules Q and cytochrome c
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ?
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Solution
Aleurone cells are the outer cell layer of the endosperm,usually only one cell thick in wheat and the only endosperm tissue a live at maturity. The cell layer of this layer are responsible for the denovo synthesis of enzyme needed during germination. The chromosome number is 63 of a plant with 42 chromosome in its root tip cells.
Find the correct combination.
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Solution
The asexual reproductive structures in Hydra is bud.The a sexual reproductive structure in sponge is gemmules, in Penicillium it is conidia and in algae it is through fragmentation.
DIRECTIONS : Each questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason). Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 : Mendel was successful in his hybridization.
Statement 2 : Garden pea proved ideal experimental material.
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Solution
Mendel chose garden pea as plant material for his experiments, since it had the following advantages:
(i) Well defined characters.
(ii) Bisexual flowers.
(iii) Predominantly self-fertilization.
(iv) Easy hybridization.
Besides these features, garden pea, being self-fertilized,had pure lines due to natural self-fertilization for a number of years. Therefore, any variety used was pure for the characters it carried. Mendel’s success was mainly based on the fact that he considered a single character at onetime.
Heartwood differs from sapwood in:
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Solution
Heartwood differs from sapwood in having dead and non-conducting elements. In old trees, the inner region that comprises dead elements with highly lignified walls is called heartwood. Heartwood does not conduct water but gives mechanical support to the stem. On the other hand,the peripheral region, which is lighter in colour are called sapwood. It is involved in the conduction of water and minerals from root to leaf.
The ‘blue baby’ syndrome results from
Which is the correct option for the all given characteristics of fungi ?
I.It includes unicellular as well as multicellular fungi.
II.In multicellular forms hyphae are branched and septate.
III.Conidiophore produces conidia (spores) exogenously inchain.
IV.Sexual spores are ascopores produced endogenously in chain.
V.Fruiting body is called ascocarp.
Which one of the following acts as secondary pollutant ?
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
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Solution
Geitonogamy is the process of transfer of pollen grains from the anther to the stigma of another flower of the same plant. Example, maize.
The turgor pressure of a turgid cell is equal and opposite to
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Solution
The pressure exerted by the cell wall over the protoplast to counter the turgor pressure. Normally wall pressure is equal and opposite to turgor pressure (WP = TP).
Following is the store house of calcium in muscles
Choose the correct names of the different bacteria according to their shapes.
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
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Solution
SA node is the natural pacemaker located in the right atrium. SA node initiates the cardiac impulse. So, artificial pacemaker will be grafted at the site of SA node.
Annual migration does not occur in the case of
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Solution
Salamander does not undergo any annual migration as it occurs in Siberian crane, Arctic tern and Salmon mainly for the search of food or for breeding
In germinating seeds fatty acids are degraded exclusively in the
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Solution
In germinating seeds, fatty acids are degraded exclusively in the glyoxysomes.Glyoxylate cycle occurs in tissues rich in fats, such as those of germinating seeds; the enzymes involved in the cycle,which have not been found in mammals, are contained in organelles called glyoxysomes.
Which of the following feature of bony fish is missing in cartilaginous fishes