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NEET Biology MCQS Mock Test Paper 5
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1. This is an adulterant
Pesticides
Urea
Iron filings in tea
All of the above
2. Identify the correct statement
Double circulation is characteristic of all vertebrates
Volume of blood in pulmonary circulation is more than the volume of blood in systemic circulation at any instant
blood pressure in pulmonary circulation is less than that of the systemic circulation
a double aortic arch is seen in birds and mammals
3. The hepatic portal vein drains blood to the liver from
stomach
heart
intestine
kidneys
4. Identify the incorrect statement
occurs only in mammals
occurs in all vertebrates
is composed of systemic circulation
is composed of pulmonary circulation
5. Blood pressure in the pulmonary artery is
same as that in the aorta
less than that in venae cavae
more than that in the carotid
more than that in the pulmonary vein
6. A stethoscope is used by doctors for cardiac auscultation. The second sound of each cardiac cycle is heard when
AV node receives signal from SA node
Semilunar valves close down after the blood flows into vessels from ventricles
AV valves open up
Ventricular walls vibrate due to gushing in of blood from atria
7. Blood pressure is maximum in mammalian aorta during
diastole of the right ventricle
systole of the left atrium
diastole of the right atrium
systole of the left ventricle
8. A patient admitted to the hospital with myocardial infarction is immediately administered with
Streptokinase
Statins
Cyclosporin – A
Penicillin
9. Systemic circulation in the cardiac system refers to
carry red oxygenated blood
carry blood to the left side of the heart
carry blood to the right side of the heart
carry oxygenated blood from lungs to heart
10. Oxygenated blood in the cardiac system
leaves from right side of the heart
leaves from left side of the heart
enters lungs from heart
does not leave the lungs
11. This is not the locomotory organ of protozoa
Flagella
Cilia
Parapodia
Pseudopodia
12. In Amoeba; excretion occurs through
Contractile vacuole
Plasmalemma
Parapodia
Nucleus
13. Kingdom Protista includes
Amoeba; Euglena; Pseudomonas
Amoeba; Euglena; Escherichia
Amoeba; Euglena; Penicillium
Amoeba; Euglena; Chlamydomonas
14. Entamoeba differs from amoeba in not having
Pseudopodia
Nucleus
Contractile vacuole
Ectoplasm
15. Amoeba was described in detail by
Aristotle
Rosenhoff
Ronald Ross
Hirshfield
16. In Amoeba; nutrition is
Holozoic
Parasitic
Saprobic
Holophytic
17. Amoeba was discovered by
Twait
Hofkins
Jenner
Rosenhof
18. Living amoeba is
Light green
Pale blue
Translucent
Transparent
19. When touched with needle; Amoeba will
Split instantly
Die
Move away
Develop pseudopodia
20. Posterior end of Amoeba is characterized by
Amphid
Lack of food vacuoles
Uropygium
Plasmid
21. This is not a function of gibberellins
promote dormancy
promote cell elongation
promote parthenocarpic fruit formation
promote elongation of internodes
22. Elongation or lengthening of rosette plants is obtained by treating it with
cytokinin
gibberellin
zeatin
auxin
23. Generally; translocation of gibberellins is non-polar occurring through
capillary rise
phloem
xylem
both xylem and phloem
24. The gibberellin involved in flowering is
GA1
GA3
GA4
GA9
25. The earliest phases of synthesis of gibberellin occur in
plastids
mitochondria
peroxisome
cytoplasm
26. Nullification of genetic dwarfism is possible by spraying with
zeatin
auxin
gibberellin
cytokinin
27. The hormone involved in the regulation of florigen synthesis is
zeatin
gibberellin
ethylene
cytokinin
28. Gibberellins found in the aleurone layer of barley increases the transcription of
lipase and cellulase
protease and amylase
protease and cellulase
lipase and protease
29. This bioassay is used to test the presence of gibberellins
dwarf pea elongation technique
chlorophyll preservation test
excised radish cotyledon enlargement test
rice seedling growth inhibition test
30. Gibberellins were named after a fungus known as
Gibberella acuminata
Gibberella africana
Gibberella fujikuroi
Gibberella gaditijirrii
31. The control and regulation of biological processes involve some enzymes. They are known as
inhibitors
regulators
allosteric enzymes
activators
32. What are the non-substrate molecules binding to the allosteric sites called?
allosteric substrate
reactants
allosteric modulators
inhibitors
33. Allosteric enzymes are
smaller than simple enzymes
larger than simple enzymes
smaller than simple enzymes but not complex
larger and more complex than simple enzyme
34. Allosteric enzymes consist of several
polypeptide chains
inhibitors
temperature ranges
active sites
35. Allosteric enzymes possess
Three types of allosteric sites
Active site and three types of allosteric sites
Active site and two types of allosteric sites
Active site and an allosteric site
36. Enzymes that are involved in the feedback inhibition are known as
Apoenzymes
Holoenzymes
Allosteric enzymes
Coenzymes
37. Blocking of enzyme action by blocking its active sites is
feedback inhibition
allosteric inhibition
competitive inhibition
non-competitive inhibition
38. The “Lock and key” theory of enzyme action was put forward by
Koshland
Fischer
Kuhne
Arrhenius
39. The fastest enzyme is
carbonic anhydrase
pepsin
DNA polymerase
DNA gyrase
40. The allosteric enzymes on the top of active sites contain
substrate
inhibitors
polypeptide chains
allosteric site
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