Which of the following guards the opning of hepatopancreatic duct into the duodenum?
Sphincter of Oddi
Reduction in pH of blood will:
reduce the rate of heart beat.
reduce the blood supply to the brain.
decrease the affinity of hemoglobin with oxygen.
release bicarbonate ions by the liver.
Name the chronic respiratory disorder caused mainly by cigarette smoking:
Asthma may be attributed to:
bacterial infection of the lungs
allergic reaction of the mast cells in the lungs
inflammation of the trachea
accumulation of fluid in the lungs
Photosensitive compound in human eye is made up of :
Guanosine and Retinol
Opsin and Retinal
Opsin and Retinol
Transducin and Retinene
OPSIN AND RETINOL
In the stomach, gastric acid is secreted by the :
gastrin secreting cells
Blood pressure in the pulmonary artery is:
same as that in the aorta.
more than that in the carotid.
more than that in the pulmonary vein.
less than that in the venae cavae.
Lack of relaxation between successive stimuli in sustained muscle contraction is known as:
Wild contraction- spasm
Slight contraction - tonus
Sustained contraction - tetany or tetanus
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options:
Both processes cannot happen simultaneously.
Both processes can happen together because the diffusion coefficient of water and CO2 is different.
The above processes happen only during night time.
One process occurs during day time, and the other at night.
Water soluble pigments found in plant cell vacuoles are:
they even get degraded by high pH
Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
Photophosphorylation and non-cyclic electron transport
Two photosystems operating simultaneously
Photophosphorylation and cyclic electron transport
2)Two photosystems operating simultaneously.
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
In a chloroplast the highest number of protons are found:
Lumen of thylakoids
Inter membrane space
lumen of thylakoids
Which of the following is not a stem modification?
Pitcher of Nepenthes
Thorns of citrus
Tendrils of cucumber
Flattened structures of Opuntia
Picher of nepenthes
Tricarpellary, syncarpous gynoecium is found in flowers of:
The standard petal of a papilionaceous corolla is also called:
Stems modified into flat green organs performing the functions of leaves are known as:
Cotyledon of maize grain is called:
Which type of tissue correctly matches with its location?
|Wall of intestine|
|Transitional epithelium||Tip of nose|
|Cuboidal epithelium||Lining of stomach|
Which one of the following statements is not true?
Tapetum helps in the dehiscence of anther
Exine of pollen grains is made up of sporopollenin
Pollen grains of many species cause severe allergies
Stored pollen in liquid nitrogen can be used in the crop breeding programmes