SAT Biology - Life Processes
Exam Duration: 45 Mins Total Questions : 30
The concentration of urea is least in:
- (a)
Renal artery
- (b)
Renal vein
- (c)
Post canal
- (d)
Dorsal aorta
Blood is composed of ___________
- (a)
Plasma and red blood cells
- (b)
Plasma and formed elements
- (c)
Red and white blood cells
- (d)
Red blood cells, white blood cells and platelets
Stomata are present on the ______________ of the leaves.
- (a)
Upper surface only
- (b)
Lower surface only
- (c)
Mostly upper surface
- (d)
Mostly lower surface
The ascent of sap in plants takes place due to __________
- (a)
Root pressure
- (b)
Transpiration pull
- (c)
Both (a) and (b)
- (d)
Osmosis
____________ carries oxygenated bloo(d)
- (a)
Pulmonary artery
- (b)
Hepatic portal vein
- (c)
Pulmonary vein
- (d)
All of the above
The main cells present in lymph are ____________
- (a)
Red blood cells
- (b)
Platelets
- (c)
Lymphocytes
- (d)
Monocytes
The numbers of ATP molecules produced during aerobic and anaerobic respiration are _______ and __________ respectively.
- (a)
2 and 38
- (b)
0 and 2
- (c)
38 and 0
- (d)
38 and 2
Respiratory surface should he ___________
- (a)
Permeable
- (b)
Thin
- (c)
Richly supplied with blood vessels
- (d)
All of the above
Sneezing can be best described as __________
- (a)
Forceful sudden expiration
- (b)
Jerky incomplete inspiration
- (c)
Vibration of the soft palate during breathing while sleeping
- (d)
Something you should never do when someone is going out
in the lunch, you ate boiled green vegetables, a piece of cooked meat, one boiled egg and a sugar candy. Which one of these foods may have been digested first?
- (a)
Boiled green vegetables
- (b)
The piece of cooked meat
- (c)
Boiled egg
- (d)
Sugar candy
In mitochondrion, the proton gradient required ATP synthesis develops across
- (a)
Inner membrane
- (b)
Inter-membrane space
- (c)
Outer membrane
- (d)
F0-F1 particles
Bicuspid and tricuspid valves are open during:
- (a)
Ventricular systole
- (b)
Ventricular diastole
- (c)
Atrial systole
- (d)
Late joint diastole
Typical 'lubb-dupp' sounds heard during heartbeat are due to:
- (a)
Closing of bicuspid and tricupid valves
- (b)
Closing of semi luna valves
- (c)
BIood under pressure through aorta
- (d)
Closure of bicuspid-tricuspid valves followed by semilunar valves
In adult man, normal BP is :
- (a)
100/80 mm Hg
- (b)
120/80 mm Hg
- (c)
100/120 mm Hg
- (d)
80/120 mm Hg
Polycythemia is-
- (a)
Increased RBCs count
- (b)
Decreased WBCs count
- (c)
Increased WBCs count
- (d)
Decreased platelets count
The coagulation of blood occurs due to
- (a)
Change of fibrinogen in the network of fibre
- (b)
Destruction of erythrocytes
- (c)
Destruction of leucocytes
- (d)
Formation of serum.
William Harvey is known for discovery of
- (a)
Blood circulation
- (b)
Blood clotting
- (c)
Respiration
- (d)
Digestion
Cardiac cycle in man takes about
- (a)
0.5 seconds
- (b)
1.0 seconds
- (c)
1.2 seconds
- (d)
0.8 seconds
Substrate which is not filtered through glomerulus:
- (a)
Plasma
- (b)
Glucose
- (c)
Blood corpuscles
- (d)
Urea
The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because:
- (a)
Cellulose present in the dung is a good insulator
- (b)
Bacterial metabolism inside the dung releases heat
- (c)
Undigested material releases heat due to oxidation by air.
- (d)
Dung is dark and absorbs a lot of heat
In man, which blood vessel takes away blood from kidney?
- (a)
Afferent arteriole
- (b)
Efferent arteriole
- (c)
Renalartery
- (d)
Renal portal vein
In which of the three groups of the following mammals is uric acid also excreted out:
- (a)
Carnivora, insectivora and marsupials
- (b)
Elephants, chiroptera, primates
- (c)
Logomorpha, man, horse
- (d)
Man, apes, dalmatian dog
Waste product/s produced by plants is/are
- (a)
CO2
- (b)
Water
- (c)
Oxygen
- (d)
All of these
Salivary amylase converts starch into
- (a)
maltose
- (b)
sucrose
- (c)
glucose
- (d)
none of the above
Mastication occurs in
- (a)
Mouth
- (b)
Oesophagus
- (c)
Stomach
- (d)
Ileum
Normal human breathing rate is
- (a)
20-25 times per minute
- (b)
15-18 times per minutes
- (c)
72 times per minute
- (d)
40-45 times per minute
_________________ is the only fluid tissue in our body
- (a)
blood
- (b)
hormones
- (c)
enzymes
- (d)
urine
Which blood cells helps in clotting of blood?
- (a)
RBC
- (b)
WBC
- (c)
Platelets
- (d)
All of the above
_______________ is the instrument used to measure blood pressure
- (a)
Stethoscope
- (b)
Sphygmomanometer
- (c)
Electro cardiogram
- (d)
Haemocynometer
The function of tracheal hairs is to -
- (a)
pass mucus out
- (b)
pass mucus in
- (c)
pass air out
- (d)
pass air in
