Which one of the following hormones is not involved in sugar metabolism ?
Which of the following joints would allow no movement ?
Ball and Socket joint
Which of the following is not a function of the skeletal system ?
Storage of minerals
Production of body heat
Production of erythrocytes
In mammalian eye, the 'fovea' is the center of the visual field, where:
the optic nerve leaves the eye.
only rods are present.
more rods than cones are found.
high density of cones occur, but has no rods.
Which one of the following hormones though synthesised elsewhere, is stored and released by the master gland?
Melanocyte stimulating hormone
The primary dentition in human differs from permanent dentition in not having one of the following type of teeth :
Human urine is usually acidic because :
excreted plasma proteins are acidic.
potassium and sodium exchange generates acidity.
hydrogen ions are actively secreted into the filtrate.
the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries.
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when :
Ventricular walls vibrate due to gushing in of blood from atria
Semilunar valves close down after the blood flows into vessels from ventricles
AV node receives signal from SA node
AV valves open up
A column of water within xylem vessels of tall trees does not break under its weight because of:
Tensile strength of water
Lignification of xylem vessels
Positive root pressure
Dissolved sugars in water
Roots play insignificant role in absorption of water in:
In photosynthesis, the light-independent reactions take place at :
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction ?
Manganese and Potassium
Magnesium and Molybdenum
Magnesium and Chlorine
Manganese and Chlorine
Root pressure develops due to :
Low osmotic potential in soil
Increase in transpiration
Which one of the following fruits is parthenocarpic?
The function of the gap junction is to :
facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules.
separate two cells from each other.
stop substance from leaking across a tissue.
performing cementing to keep neighbouring cells together.
The chitinous exoskeleton of arthropods is formed by the polymerisation of :
D - glucosamine
N - acetyl glucosamine
keratin sulphate and chondroitin sulphate
THE CHITINOUS EXOSKELETON OF ARTHROPODS IS FORMED BY THE POLMERISATION OF N-ACETYL GLUCOSAMINE
The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of :
Read the different components from (a) to (d) 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 :
The correct order is :
Coconut water from a tender coconut is:
Free nuclear endosperm
Innermost layers of the seed coat
Axile placentation is present in :