Multiple Choice QuestionsWhich of the following guards the opening of hepatopancreatic duct into the duodenum?
illeocaecal valve
Pyloric sphincter
Sphincter of Oddi
Sphincter of Oddi
C.
Sphincter of Oddi
Sphincter of Oddi guards the opening of the hepatopancreatic duct into the duodenum.
Water vapour comes out from the plant leaf through stomatal opening. through the same stomatal opening. carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options
Both processes can happen together because the diffusion coefficient of water and CO2 is different
The above processes happen only during night time
One process occurs during day time and other at night
One process occurs during day time and other at night
A.
Both processes can happen together because the diffusion coefficient of water and CO2 is different
Diffusion of water vaour and C02 are an independent process. Their diffusion depends on the difference in their ppartial pressure in the atmosphere as well as inside the leaves.
In the stomach, gastric acid is secreted by the
parietal cells
peptic cells
acidic cells
acidic cells
A.
parietal cells
The parietal cells secrete HCl in the stomach.
Which one of the following statements is wrong?
cellulose is a polysaccharide
Uracil is a pyrimidine
Glycine is a sulphur containing amino acid
Glycine is a sulphur containing amino acid
C.
Glycine is a sulphur containing amino acid
Glycine does not contain sulphur
In mammals, which blood vessel would normally carry largest amount of urea?
Dorsal aorta
Hepatic vein
Hepatic portal vein
Hepatic portal vein
B.
Hepatic vein
Urea is synthesised in the liver. So, maximum amount of urea of urea is present in hepatic vein and minimum in Renal vein.
Which of the following is not a stem modification?
thorns of citrus
tendrils of cucumber
Flattened structures of Opuntia
Flattened structures of Opuntia
D.
Flattened structures of Opuntia
Pitcher of nepenthes is a modification of the leaf.
Which one of the following cell organelles is enclosed by a single membrane?
Chloroplasts
Lysosomes
Nuclei
Nuclei
B.
Lysosomes
All others except lysosomes have double membrane.
Which one of the following statements is wrong?
Golden algae are also called desmids
Eubacteria are also called false bacteria
Phycomycetes are also called algal fungi
Phycomycetes are also called algal fungi
B.
Eubacteria are also called false bacteria
Cotyledon of maize grain is called
coleorhiza
caleoptile
scutellum
scutellum
C.
scutellum
Large, shield-shaped cotyledon of a grass family is called scutellum.
Coleorhiza is a sheath protecting the root germinating grass.
Coleoptile is a sheath covering emerging shoot. Plumule is a rudimentary shoot of an embryo plant.
Which one of the following characteristics is not shared by birds and mammals?
Breathing using lungs
Viviparity
Warm-blooded nature
Warm-blooded nature
B.
Viviparity
Mammals are viviparous while birds are oviparous.
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