Recent activity by momin

The mass of gas adsorbed, x, per unit mass of adsorbate, m, was measured at various pressures, p. A graph between $\log{x\over m}$ and $\log p$ gives a straight line with slope equal to 2 and the intercept equal to 0.4771. The value of $x\over m$ at a ...

Consider the following reactions : (i) Glucose + ROH $\require{mhchem}\ce{->[\text{dry }HCl]}$ Acetal $\ce{->[\text{x eq. of}][\ce{(CH3CO)2O}]}$ acetyl derivative (ii) Glucose $\ce{->[\ce{Ni/H2}]}$ A $\ce{->[\text{y eq. of}][\ce{(CH3CO)2O}]}$ acetyl ...

In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound ? (1) H3C–Br (2) H3C–CH2–Br (3) (4)

The major aromatic product C in the following reaction sequence will be :

Match the following events that occur in their respective phases of cell cycle and select the correct option : (a) G1 phase (i) Cell grows and organelle duplication (b) S phase (ii) DNA replication and chromosome duplication (c) G2 phase (iii) Cytoplasmic ...

In cockroach, identify the parts of the foregut in correct sequence : (1) Mouth → Pharynx → Oesophagus → Crop → Gizzard (2) Mouth → Oesophagus → Pharynx → Crop → Gizzard (3) Mouth → Crop → Pharynx → Oesophagus → Gizzard (4) Mouth → Gizzard → Crop → Pharynx ...

Match the following columns and select the correct option : Column-I Column-II (a) Aptenodytes (i) Flying fox (b) Pteropus (ii) Angel fish (c) Pterophyllum (iii) Lamprey (d) Petromyzon (iv) Penguin (1) (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii) (2) (a)-(iii), (...

Match the following columns and select the correct option : Column - I Column - II (a) Gout (i) Decreased levels of estrogen (b) Osteoporosis (ii) Low Ca++ ions in the blood (c) Tetany (iii) Accumulation of uric acid crystals (d) Muscular dystrophy (iv) ...

Match the following columns and select the correct option : Column-I Column - II (a) Pneumotaxic Centre (i) Alveoli (b) O2 Dissociation curve (ii) Pons region of brain brain (c) Carbonic Anhydrase (iii) Haemoglobin (d) Primary site of exchange of gases (iv)...

Match the following columns and select the correct option : Column - I Column - II (a) Rods and Cones (i) Absence of photoreceptor cells (b) Blind Spot (ii) Cones are densely packed (c) Fovea (iii) Photoreceptor cells (d) Iris (iv) Visible coloured portion ...

Inbreeding depression is (1) Reduced fertility and productivity due to continued close inbreeding (2) Reduced motility and immunity due to close inbreeding (3) Decreased productivity due to mating of superior male and inferior female (4) Decrease in body ...

Which of the following options does correctly represent the characteristic features of phylum Annelida? (1) Diploblastic, mostly marine and radially symmetrical. (2) Triploblastic, unsegmented body and bilaterally symmetrical. (3) Triploblastic, segmented ...

Progestogens alone or in combination with estrogens can be used as a contraceptive in the form of (1) Pills only (2) Implants only (3) Injections only (4) Pills, injections and implants

In Human beings, at the end of 12 weeks (first trimester) of pregnancy, the following is observed : (1) Movement of the foetus (2) Eyelids and eyelashes are formed (3) Most of the major organ systems are formed (4) The head is covered with fine hair

Which of the following conditions cause erythroblastosis foetalis? (1) Both mother and foetus Rh+ve (2) Mother Rh+ve and foetus Rh–ve (3) Mother Rh–ve and foetus Rh+ve (4) Both mother and foetus Rh–ve

The rate of decomposition is faster in the ecosystem due to following factors EXCEPT (1) Detritus richer in lignin and chitin (2) Detritus rich in sugars (3) Warm and moist environment (4) Presence of aerobic soil microbes

RNA interference is used for which of the following purposes in the field of biotechnology? (1) to reduce post harvest losses (2) to develop a plant tolerant to abiotic stresses (3) to develop a pest resistant plant against infestation by nematode (4) to ...

Match the following columns and select the correct option : Column - I Column - II (i) Typhoid (a) Haemophilus influenzae (ii) Malaria (b) Wuchereria bancrofti (iii) Pneumonia (c) Plasmodium vivax (iv) Filariasis (d) Salmonella typhi (1) (i)-(a), (ii)-(b), ...

The laws and rules to prevent unauthorised exploitation of bio-resources are termed as (1) Biopiracy (2) Biopatenting (3) Bioethics (4) Bioengineering

Match the following columns and select the correct option: Column-I Column-II (a) Pituitary hormone (i) Steroid (b) Epinephrine (ii) Neuropeptides (c) Endorphins (iii) Peptides, proteins (d) Cortisol (iv) Biogenic amines (1) (a)-(iii), (b)-(iv), (c)-(i), (d...

Match the following columns and select the correct option: Column-I Column-II (a) Ovary (i) Human chorionic Gonadotropin (b) Placenta (ii) Estrogen & Progesterone (c) Corpus luteum (iii) Androgens (d) Leydig cells (iv) Progesterone only (1) (a)-(ii), (b)-(i...

Spooling is (1) Collection of isolated DNA (2) Amplification of DNA (3) Cutting of separated DNA bands from the agarose gel (4) Transfer of separated DNA fragments to synthetic membranes

Select the correct statement from the following : (1) PCR is used for isolation and separation of gene of interest (2) Gel electrophoresis is used for amplification of a DNA segment (3) The polymerase enzyme joins the gene of interest and the vector DNA (4)...

During Meiosis I, in which stage synapsis takes place? (1) Leptotene (2) Pachytene (3) Zygotene (4) Diplotene

Select the correct option of haploid cells from the following groups: (1) Primary spermatocyle, Secondary spermatocyte, Second polar body (2) Primary oocyte, Secondary oocyte, Spermatid (3) Secondary spermatocyte, First polar body, Ovum (4) Spermatogonia, ...

The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies (lgA) to protect the infant. This type of immunity is called as : (1) Autoimmunity (2) Passive immunity (3) Active immunity (4)...

Select the incorrectly matched pair from following : (1) Ostcocytes - Bone cells (2) Chondrocytes - Smooth muscle cells (3) Neurons - Nerve cells (4) Fibroblast - Areolar tissue

Match the following columns and select the correct option : Column - I Column - II (a) Dragonflies (i) Biocontrol agents of several plant pathogens (b) Bacillus thuringiensis (ii) Get rid of Aphids and mosquitoes (c) Glomus (iii) Narrow spectrum ...

The proteolytic enzyme rennin is found in : (1) Pancreatic juice (2) Intestinal juice (3) Bile juice (4) Gastric juice

A Hominid fossil discovered in Java in 1891, now extinct, having cranial capacity of about 900 cc was (1) Australopithecus (2) Homo erectus (3) Neanderthal man (4) Homo sapiens