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Answers posted by swapnarajan1982
Questions
1946
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votes
If one strand or helix on the Watson-Crick model has a base sequence of 5
answered
Apr 23, 2020
3'prime CAGTACTG5'<< Enter Text >>
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votes
A transmitting antenna at the top of a tower has a height 32 m and the height of the receiving antenna is 50 m .What is the maximum distance between them for satisfactory communication in line of sight (LOS) mode ?
answered
Dec 20, 2019
Maximum line of right distance$d_m=\sqrt{2R{h_T}}+\sqrt{2R{h_R}}$$h_t $& $h_R $ are height of an...
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Both sickle cell anemia and Huntington's chorea are-
answered
Dec 2, 2019
These are prevalent right from the time of birth.
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In which one of the following sets of animals do all the four give birth to young ones ?
answered
Dec 2, 2019
They are all mammals and give birth to young ones.
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Biradial symmetry and lack of cnidoblasts are the characteristics of-
answered
Dec 2, 2019
Although sea anemone has biradial symmetry. Ctenoplana and Beroe lack cnidoblasts and...
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Which one of the following has an open circulatory system ?
answered
Dec 2, 2019
Cockroach has an open circulatory system.
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Which one of the following statements is incorrect ?
answered
Dec 2, 2019
Residual air is the air that remains in lungs after the most forceful expiration. It is about 1200 m...
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Withdrawal of which of the following hormones is the immediate cause of menstruation ?
answered
Dec 2, 2019
The menstrual cycle consists of three phases; proliferative phase, secretory phase and menstrual pha...
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Which of the following is an accumulation and release centre of neurohormones ?
answered
Dec 2, 2019
Almost all secretion by the pituitary gland are controlled by hormonal signal from hypothalamus. Th...
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Which one of the following is not a second messenger in hormone action ?
answered
Dec 2, 2019
cGMP, Calcium and cAMP act as secondary messengers in hormone action.
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What is common about Trypanosoma, Noctiluca, Monocystis and Giardia-
answered
Dec 2, 2019
Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists. Trypanos...
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Jurassic period of the Mesozoic era characterized by-
answered
Dec 2, 2019
Jurassic period is the second geological period of Mesozoic era. In this pe...
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Which of the following pairs of an animal and a plant represents endangered organisms in India-
answered
Dec 2, 2019
Endangered plant is Bentinckia nicobarica- Bentinck palm & endangered animal is Red Panda
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A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from-
answered
Dec 2, 2019
Borderline personality disorder (BPD) is a serious mental illness characterized by pervasive instabi...
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Bowman's glands are found in-
answered
Dec 2, 2019
Olfactory glands, also known as Bowman's glands, are a type of nasal gland situa...
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Examination of blood of a person suspected of having anemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms ?
answered
Dec 2, 2019
Anaemia refers to any condition in which there is an abnormally low haemoglobin concentration and/or...
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The 'blue baby' syndrome results from-
answered
Dec 2, 2019
The most common cause of blue baby syndrome is water contaminated with nitrates. After a&n...
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Restriction endonuclease -
answered
Dec 2, 2019
They have recognition sites and their they cut the DNA molecule.
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Sertoli cells are regulated by the pituitary hormone known as-
answered
Dec 2, 2019
Sertoli cells are regulated by FSH (follicle stimulating hormone) as the FSH receptors ar...
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Which one of the following does not act as a neurotransmitter ?
answered
Dec 2, 2019
The resolution power of the electron microscope rs much higher than that of the light microscope. As...
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Which one of the following is a matching set of phylum and its three examples ?
answered
Dec 2, 2019
Loligo-Squid or sea arrow Teredo-Ship wormOctopus-Devil’s fish. All are molluscs
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A major breakthrough in the studies of cells came with the development of electron microscope. This is because-
answered
Dec 2, 2019
The resolution power of the electron microscope rs much higher than that of the light microscope. As...
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An important evidence in favour of organic evolution is the occurrence of-
answered
Dec 2, 2019
An important evidence in favour of organic evolution is the occurrence of homologous and vestigial o...
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An important evidence in favour of organic evolution is the occurrence of-
answered
Dec 2, 2019
An important evidence in favour of organic evolution is the occurrence of homologous and vestigial o...
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How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $CO_2$ and $H_2O$ yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?
answered
Dec 2, 2019
Since all the energy is being converted into ATP so1ATP energy is 12kcaltotal energy is 686kcalno. o...
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Crop plants grown in monoculture are-
answered
Dec 2, 2019
Monoculture is the destruction of a diverse ecosystem and replacement with a single species or&...
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Which one of the following amino-acids was not found to be synthesized in Miller's experiment ?
answered
Dec 2, 2019
In Miller’s experiments glycine, aspartic acid and alanine were synthesized.
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The translocation of organic solutes in sieve tube members is supported by-
answered
Dec 2, 2019
According to mass flow hypothesis the transport of organic solutes takes place from source to sink, ...
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Test cross involves-
answered
Dec 2, 2019
Test cross helps to identify the genotype of the individual in question.
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In a moss the sporophyte-
answered
Dec 2, 2019
The main plant body is gametophytic (n) which is independent and foliose. It forms major part of the...
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Sulphur is an important nutrient for optimum growth and productivity in-
answered
Dec 2, 2019
Sulphur is an important nutrient for optimum growth & productivity of pulse crops...
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Which one of the following is the correctly matched pair of an endangered animal and a National Park ?
answered
Dec 2, 2019
Lion-Gir Wild ass-Wild Ass Wildlife Sanctuary in Rann of KutchGreat Indian Bustard- Kutch Bustard S...
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What type of placentation is seen in sweet pea ?
answered
Dec 2, 2019
It occurs in a monocarpellary, unilocular ovary. The ovules are borne along the junction of the two ...
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In which mode of inheritance do you expect more maternal influence among the offspring ?
answered
Dec 2, 2019
Egg cell has copious cytoplasm when compared to sperm. SO cytoplasmic inheritance will have more mat...
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votes
A common structural feature of vessel elements and sieve tube elements is-
answered
Dec 2, 2019
The wall of both vessel and sieve tube elements are perforated by large opening. Due to this feature...
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Moss peat is used as a packing material for sending flowers and live plants to distant places because-
answered
Dec 2, 2019
Peat absorbs water and can keep plants with moisture preventing their desiccation.
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Phenotype of an organism is the result of-
answered
Dec 2, 2019
Phenotype refers to external appearance of an organism. Phenotype is determined by genotype- genetic...
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Which antibiotic inhibits interaction between tRNA and mRNA during bacterial protein synthesis ?
answered
Dec 2, 2019
The antibiotic which stops the interaction between tRNA and mRNA is Neomycin. Basically, it doe...
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votes
In which of the following fruits is the edible part the aril ?
answered
Dec 2, 2019
In Litchi aril which is fleshy is the edible part.
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Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield ?
answered
Dec 2, 2019
If a pulse crop possesses premature yellowing of leaves and decrease in yield then application of ma...
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votes
Which one of the following statements is correct ?
answered
Dec 2, 2019
The autonomous nervous system regulates the secretion of glands whereas the glands do not regulate t...
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votes
In order to obtain virus-free plants through tissue culture the best method is-
answered
Dec 2, 2019
Meristems are free from viruses.
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An enzyme that can stimulate germination of barley seeds is-
answered
Dec 2, 2019
The starch is hydrolysed by α-amylase to monosaccharides unit at the time of germination o
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votes
The arrangement of the nuclei in a normal embryo sac in the dicot plants is-
answered
Dec 2, 2019
Egg cell+ 2 synergids at chalazal end; 2 polar nuclei in the centre and 3 antipodals at the opposite...
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votes
If a colourblind woman marries a normal visioned man, their sons will be -
answered
Dec 2, 2019
It’s a sex (X) linked recessive disorder. Sons receive the defective gene from themother. Thus all w
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votes
Which one of the following is an example of polygenic inheritance ?
answered
Dec 2, 2019
Determined by four genes. The combination of dominant and recessive genes decides the skin shade.
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During photorespiration the oxygen consuming reaction (s) occur in-
answered
Dec 2, 2019
The first reaction of photorespiration occurs in stroma of chloroplast. In this&...
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During photorespiration the oxygen consuming reaction (s) occur in-
answered
Dec 2, 2019
The first reaction of photorespiration occurs in stroma of chloroplast. In this&...
0
votes
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread ?
A. Temperature of about 25ºC
B. Temperature of about 5ºC
C. Relative humidity of about5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place
Choose the answer from the following options
answered
Dec 2, 2019
Mucor is a saprophytic fungus belonging to the order Mucorales and family Mucoraceae and grows on de...
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votes
Curing of tea leaves is brought about by the activity of-
answered
Dec 2, 2019
Curing of tea levels is brought about by the activity of bacteria. It is essentially ...
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