Multiple Choice QuestionsWhat are Singer and Nicolson known for?
One-gene-one-enzyme hypothesis
Plasma membrane modifications
Fluid-mosaic model of plasma membrane
Structure of DNA
Which of the following have porous body and are diploblastic?
Aurelia and Obelia
Adamsia and Euplectella
Leucosolenia and Spongilla
Sycon and Hydra
Which one is correct regarding electrocardiograph (ECG)?
P- wave represents the electrical excitation of the ventricle.
QRS complex represents repolarisation of the ventricles
T- wave represents repolarisation of the atria
By counting the number of QRS complexes one can determine the pulse rate
What is the effect of GnRH produced by hypothalamus?
Stimulates the synthesis and secretion of androgens
Stimulates secretion of milk in mammary glands
Stimulates foetal ejection reflex
Stimulates synthesis of carbohydrates from non- carbohydrates in liver
A.
Stimulates the synthesis and secretion of androgens
Gonadotropin Releasing Hormone (GnRH) is a releasing hormone. It stimulates the anterior lobe of the pituitary gland to secrete two gonadotropic hormones- FSH (Follicle Stimulating Hormone) and LH (Luteinising Hormone).
In males, LH stimulates testosterone production from the interstitial cells of the testes (leydig cells). FSH stimulates testicular growth and enhances the production of an androgen- binding protein by the Sertoli cells, which are a component of the testicular tubule necessary for sustaining the maturing sperm cells.
In females, FSH stimulates the growth of ovarian follicles in the ovary before the release of an egg from one follicle at ovulation. It also increases oestradiol production. LH triggers ovulation and development of the corpus luteum.
Chemosensitive area of respiratory centre in medulla is affected by
less CO2 and H+ ions
less O2 and H+ ions
excess CO2 and H+ ions
excess O2 and H+ ions
Microvilli of intestinal epithelium are similar in function with
typhlosole in earthworm
hepatic caecae in cockroach
intestinal caecum in earthworm
Malpighian tubules in coackroach
The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and bronchi are known as
squamous epithelium
ciliated epithelium
columnar epithelium
cubical epithelium
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