Multiple Choice QuestionsIn germinating seeds fatty acids are degraded exclusively in the
proplastid
glyoxisomes
peroxisomes
peroxisomes
B.
glyoxisomes
Glyoxysomes are found to occur in the cells of yeast, Neurospora and oil-rich seeds of many higher plants. During germination of oily seeds, the stored lipid molecules of spherosomes are hydrolyzed by the enzyme lipase to glycerol and fatty acids. The long chain fatty acids are then broken down by successive removal of two carbon fragments in the process of beta -oxidation.
Peroxisomes are present in all photosynthetic cells of higher plants in etiolated leaf tissue. It is the site of hydrogen peroxide metabolism and glycolate cycle.
Mitochondria is the site of aerobic respiration in a eukaryotic cell. It is called powerhouse of the cell.
During the development of chloroplast, the first structure to appear is so called proplastid, which has a double membrane.
Which one of the following is resistant to enzyme action?
Cork
Wood fibre
Pollen exine
Pollen exine
Which one of the following is not a characteristic of phylum-Annelida?
Closed circulatory system
Segmentation
Pseudocoelom
Pseudocoelom
In humans, blood passes f from the post caval to the diastolic right atrium of heart due to
Pushing open of the venous valves
suction pull
Stimulation of the sino-auricular node
Stimulation of the sino-auricular node
Which one of the following is the true description of an animal concerned?
Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine.
Frog - Body divisible into three regions- head, neck and trunk
Rat - Left kidney is slightly higher in position that the right one
Rat - Left kidney is slightly higher in position that the right one
Which one of the following phyla is correctly matched with its two general characteristics?
Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae.
Chordata - Notochord at some stage and separate anal and urinary openings to the outside
Echinodermata - Pentamerous radial symmetry and mostly internal fertilisation
Echinodermata - Pentamerous radial symmetry and mostly internal fertilisation
Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
Nictitating membrane and blind spot in human eye - Vestigial organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because
High energy bonds are formed in mitochondrial proteins
ADP is pumped out of the matrix into the intermembrane space
a proton gradient forms across the inner membrane
a proton gradient forms across the inner membrane
Consider the following statements about biomedical technologies
A) During open heart, surgery blood is circulated in the heart -lung machine.
B) Blockage in coronary arteries has removed an angiography.
C) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of the body.
D) X -ray provides clear and detailed images of organs like prostate glands and lungs.
Which two of the above statements are correct?
B and D
C and D
A and C
A and C
Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
Liver fluke, Sea anemone, Sea cucumber - Bilateral symmetry
Centipede, prawn, sea urchin - Jointed appendages
Scorpion, spider, cockroach - Ventral solid central nervous system
Scorpion, spider, cockroach - Ventral solid central nervous system
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