Singer and Nicholson’s model of plasma membrane differs from Robertson’s model in the
Options
(a) Number of lipid layers (b) Arrangement of lipid layers (c) Arrangement of proteins (d) Absence of protein in […]
Simultaneous movement of two molecules across a membrane in the same direction is known as
Options
(a) antiport (b) symport (c) uniport (d) biport
Correct Answer:
symport
Explanation:
No explanation available. Be the […]
Sella turcica is a
Options
(a) Covering of kidney (b) Covering of testis (c) Depression in brain (d) Depression in skull which lodges the pituitary body
Correct Answer:
Depression in skull which lodges […]
Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
Options
(a) absence of resin duct and leaf venation (b) presence of vessel […]
Secondary growth do not occur in
Options
(a) Riccia (b) Funaria (c) selaginella (d) none of these
Correct Answer:
none of these
Explanation:
Riccia, Funaria, Selaginella shows secondary growth
Scientist who gave concept of species and proposed classification of insects, reptiles and quadrapods
Options
(a) carolus linnaeus (b) john ray (c) george bilton (d) george cuvier
Correct Answer:
john ray
Explanation:
Francis […]
Sap wood is otherwise called
Options
(a) Duramen (b) Alburnum (c) Pith (d) Medullary rays
Correct Answer:
Alburnum
Explanation:
Alburnum is an outer light coloured zone called the sap wood which are physiologically […]
Root pressure is due to
Options
(a) passive transport (b) gravitation (c) active transport (d) diffusion
Correct Answer:
active transport
Explanation:
As various ions from the soil are actively transported into the vascular […]
Role of peroxisomes in photorespiration is
Options
(a) helps in the oxidation of glycolate (b) helps in the oxygenation of vacuole (c) helps in the synthesis of PGA (d) helps in the reduction […]
Robert Hooke used the term cell in the year
Options
(a) 1650 (b) 1665 (c) 1865 (d) 1960
Correct Answer:
1665
Explanation:
No explanation available. Be the first to write the explanation for […]
2017 Copyright Doctor Dreams Training Academy