Multiple Choice QuestionsRead the different components from I to IV in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem:
(a) Secondary cortex
(b) Wood
(c) Secondary phloem
(d) Phellem
The correct order is
(c), (d), (b), (a)
(a), (b), (d), (c)
(d), (a), (c), (b)
(d), (a), (c), (b)
Which of the following joints would allow no movement?
Fibrous joint
Cartilaginous joint
Synovial Joint
Synovial Joint
The wheat grain has an embryo with one large, shield-shaped cotyledon known as
Epiblast
Coleorrhizia
Scutellum
Scutellum
Which of the .following structures is not found in a prokaryotic cell?
Nuclear envelope
Ribosome
Mesosome
Mesosome
The imperfect fungi which are decomposer of litter and help in mineral cycling belong to
Deuteromycetes
Basidiomycetes
Phycomycetes
Phycomycetes
Column-I |
Column-II |
| Thylakoids | Dis-shaped sacs in Golgi apparatus C |
| Cristae | Condensed structure of DNA |
| Cisternae | flat membranous sacs in stroma |
| Chromatin | Infoldings mitochondrial |
During biological nitrogen fixation inactivation of nitrogenase by oxygen poisoning is prevented by
Leghaemogolobin
Xanthophyll
Carotene
Carotene
Which one of the following hormones is not involved in sugar metabolism?
Cortisone
Aldosterone
Insulin
Insulin
B.
Aldosterone
Aldosterone is not involved in sugar metabolism. It is a steroid hormone (mineralocorticoid) produced by the outer section(zona glomerulosa) of the adrenal cortex in the adrenal gland. It plays a central role in the adrenal gland. It plays a central role in the regulation of blood pressure mainly by acting on the distal tubules and collecting ducts of the nephron, increasing reabsorption of ions and water in the kidney, to cause the conservation of sodium, secretion of potassium, increase in water retention and decrease in blood pressure and blood volume.
Which of the following is not a function of the skeletal system?
Production of erythrocytes
Storage of minerals
Production of body heat
Production of body heat
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