Alzheimer disease in humans is associated with the deficiency of:
Options
(a) glutamic acid (b) acetylcholine (c) gamma aminobutyric acid (GABA) (d) dopamine
Correct Answer:
acetylcholine
Explanation:
Alzheimer disease in humans is associated with […]
Which one of the following is wrongly matched?
Options
(a) Nostoc-Water blooms (b) Spirogyra-Motile gametes (c) Sargassum-Chlorophyll c (d) Basidiomycetes-Puffballs
Correct Answer:
Spirogyra-Motile gametes
Explanation:
Cyanobacteria, e.g., Nostoc, grow in such abundance as to […]
The function of leg haemoglobin in the root nodules of legumes is:
Options
(a) inhibition of nitrogenase activity (b) oxygen removal (c) nodule differentiation (d) expression of nif gene
Correct Answer:
oxygen removal
The cell-mediated immunity inside the human body is carried out by
Options
(a) B-lymphocytes (b) Thrombocytes (c) Erythrocytes (d) T-lymphocytes
Correct Answer:
T-lymphocytes
Explanation:
The cell-mediated immunity inside the human body is carried out […]
Pigment-containing membranous extensions in some cyanobacteria are:
Options
(a) Basal bodies (b) Pneumatophores (c) Chromatophores (d) Heterocysts
Correct Answer:
Chromatophores
Explanation:
In some photoautotrophic bacteria bacteriochlorophyll and bacteriophaeophytin or bacterioviridin pigments containing membraneous extensions […]
One of the most frequency used techniques in DNA fingerprinting is
Options
(a) AFLP (b) VNTR (c) SSCP (d) SCAR
Correct Answer:
VNTR
Explanation:
No explanation available. Be the first to write the […]
One of the following is not a method of contraception – which one?
Options
(a) Tubectomy (b) Condoms (c) Pills of a combination of oxytocin and vasopressin (d) Lippes loop
Correct Answer:
Pills […]
Importance of day length in flowering of plants was first shown in
Options
(a) lemna (b) tobacco (c) cotton (d) petunia
Correct Answer:
tobacco
Explanation:
Photoperiodism was first studies by Garner and Allard (1920). […]
When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed
Options
(a) microevolution (b) co-evolution (c) convergent evolution (d) divergent evolution
Correct Answer: […]
The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in:
Options
(a) nails (b) ear ossicles (c) tip of the nose (d) vertebrae
Correct Answer: […]
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