Multiple Choice QuestionsMoss peat is used as a packing material for sending flowers and live plants to distant places because
it is easily available
it is hygroscopic
it reduces transpiration
it reduces transpiration
A common structural feature of vessel elements and sieve tube elements is
thick secondary walls
pores on lateral walls
presence of P-protein
presence of P-protein
The thalloid body of a slime mould (Myxomycetes) is known as
Autosomal
Cytoplasmic
Y-linked
Y-linked
What type of placentation is seen in sweet pea?
Basal
Axile
Free central
Free central
D.
Free central
In sweetpea (Pisum sativum), the placentation is marginal, in which the placenta develops along the junction of two carpels, in a unilocular ovary. In basal placentation, the ovules are few or reduced to one and are borne at the base of ovary. e.g. compositae.
In axile placentation, margins of carpels fold inwards, fusing together in centre of ovary to form a single central placenta. Ovary is divided into as my locules, as there are carples e.g., Hibiscus, Asphodelus. Free-central placentation possesses a placenta arises as a central upgrowth from ovary base e.g. Stellaria.
Which of the following statements regarding mitochondrial membrane is not correct?
The outer membrane is permeable to all kinds of molecules
The enzymes of the electron transfer chain are embedded in the outer membrane
The inner membrane is highly convoluted forming a series of infoldings
The inner membrane is highly convoluted forming a series of infoldings
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
Two
Thirty
Fifty seven
Fifty seven
An organic substance bound to an enzyme and essential for its activity is called
coenzyme
holoenzyme
apoenzyme
apoenzyme
Bowman's glands are found in
olfactory epithelium
external auditory canal
cortical nephrons only
cortical nephrons only
Sulphur is an important nutrient for optimum growth and productivity in
pulse crops
cereals
fibre crops
fibre crops
Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of
Asteraceae
Brassicaceae
Solanaceae
Solanaceae
Switch
