Medical Entrance Exams NEET practice set-11
1. Homeostasis operates at—
(a) Subcellular level
(b) Cellular level
(c) Individual level
(d) All levels of organization in living beings
2. Master copy of genetic information is—
(a) m-RNA (b) DNA
(c) Nucleus (d) r-RNA
3. In Spallanzani’s experiment, boiled broth remained unspoiled in—
(a) Swan-necked flasks
(b) Seated flasks
(c) Loosely corked flasks
(d) Open flasks
4. Coacervates were—
(a) Colloidal complex (b) Protobionts
(c) Both (a) and (b) (d) None of these
5. The simple organic compounds that evolved in the direction of origin of life upon primitive earth may have been—
(a) Proteins and nucleic acid
(b) Amino acids and nucleotides
(c) Urea and proteins
(d) Urea and amino acids
6. Abiogenesis means—
(a) Origin of life from non-living substances
(b) Origin of life from living organisms
(c) Origin of viruses and microbes
(d) None of these
7. Trilobites were dominant in—
(a) Precambrian (b) Cambrian
(c) Ordovician (d) Silurian
8. Man originated during—
(a) Pliocene (b) Palaeocene
(c) Miocene (d) Oligocene
9. Analogous organs have a—
(a) Common embryonic origin but perform different functions
(b) Different embryonic origin and perform different functions
(c) Common embryonic origin and perform similar functions
(d) Different embryonic origin but perform similar functions
10. Industrial melanism provides support to—
(a) Lamarck’s theory of inheritance of acquired characters
(b) Darwinism
(c) Mutation theory
(d) All of the above
11. The concept of sudden genetic change which breeds true in a species is represented as—
(a) Inheritance of acquired characters
(b) Natural selection
(c) Laws of inheritance
(d) Mutation
12. Chromosomal aberrations occur by—
(a) Morphological changes
(b) Aneuploidy
(c) Polyploidy
(d) All the above
13. The microscope usually used for viewing living cells, tissues or chromosomes in a living cell is—
(a) Compound microscope
(b) Electron microscope
(c) Phase contrast microscope
(d) Oil immersion microscope
14. Sudan III is used for identification of—
(a) Glycogen (b) Protein
(c) DNA (d) Fat
15. A technique other than microscopy which can be used in study of cells is—
(a) Chromatography (b) Plasmolysis
(c) Autoradiography (d) None of these
16. Pectic substances are generally stained with a dye which is—
(a) Iodine (b) Cotton blue
(c) Safranin (d) Ruthernium red
17. Protoplasm is—
(a) Non living matter
(b) Bearer of hereditary characters
(c) Living matter without function
(d) Physical basis of life
18. Animal cell differs from plant cell in possessing—
(a) Golgi body (b) Vacuole
(c) Plastid (d) Centrosome
19. Prokaryotic genetic system has—
(a) Neither DNA nor histones
(b) Both DNA and histones
(c) DNA but no histones
(d) Either DNA or histones
20. Larger cell have—
(a) High metabolic rate
(b) High respiration rate
(c) Low surface : volume ratio
(d) High surface : volume ratio
21. Lipid nature of the membrane was proposed by—
(a) Nigelli (b) Plowe
(c) Lewis (d) Overton
22. Fluid mosaic model was proposed by—
(a) Singer and Nicolson
(b) Watson and Crick
(c) Singer
(d) Lucy
23. Glycocalyx is present on—
(a) Outer surface of plasma membrane
(b) Outer surface of internal cell membrane
(c) Inner surface of plasma membrane
(d) Inner surface of internal cell membrane
24. As per model proposed by Danielle and Davidson, the lipid molecules in the plasma membrane are situated at—
(a) Right angle to the surface
(b) Acute angle to the surface
(c) Obtuse angle to the surface
(d) Parallel to the surface
25. Nucleolus is formed by particular region of chromosomes called—
(a) Primary constriction
(b) Secondary constriction
(c) Sat chromosome
(d) Balbiani ring
26. Endoplasmic reticulum is absent in—
(a) Mammalian RBC (b) Prokaryotes
(c) Viruses (d) All above
27. The acrosome of the sperm is formed by—
(a) Golgi complex (b) Cytoplasm
(c) Nucleolus (d) ER
28. Dynein is unique protein of—
(a) Ribosomes (b) Centrioles
(c) Flagella (d) Nucleus
29. Succinic dehydrogenase is the only enzyme of TCA cycle associated with—
(a) Outer membrane (b) Inner membrane
(c) Matrix (d) Perimitochondrial space
30. Plastids that store starch are called—
(a) Aleuronoplasts (b) Elaioplasts
(c) Amyloplasts (d) All of these
31. Photorespiration occurs in plant cells in—
(a) Dictyosomes (b) Glyoxisomes
(c) Peroxisomes (d) Endoplasmic reticulum
32. DNA is unique among molecules is that it can—
(a) Form multipolymer complexes
(b) Withstand very high temperatures
(c) Replicate itself
(d) None of these
33. For structure of nucleic acid, which of the following statements is wrong?
(a) DNA can be single-stranded in some viruses
(b) RNA can be double-stranded occasionally
(c) There are as many as 12 bases per turn in Z-DNA
(d) The length of the helix in 45 Å in B-DNA
34. Maximum amount of manganese occurs in—
(a) Bones and teeth (b) Muscles
(c) Mitochondria (d) Chloroplasts
35. Smoothening reagent in cosmetics is—
(a) Cellulose acetate (b) Cellulose nitrate
(c) CMC (d) Paper Pulp
36. An apoenzyme is a—
(a) Vitamin (b) Amino acid
(c) Carbohydrate (d) Protein
37. Enzymes do not occur in—
(a) Viruses (b) Bacteria
(c) Fungi (d) Algae
38. Turn-over number of an enzyme is dependent upon—
(a) Size of enzyme (b) Active sites
(c) Molecular weight of enzyme
(d) Concentration of substrate
39. One molecule of an enzyme is needed to convert 2 molecules of substrate into product in 5 minutes 10 molecules of enzyme and 25 molecules of substrate are mixed in a test tube. After 10 minutes test tube will be having—
(a) Products + 5 molecules of unreacted substrate
(b) Products only
(c) Products and enzyme
(d) Product + Enzyme + 5 molecules of unreacted substrate
40. Mitosis is process of cell division in which there is—
(a) Doubling of chromosomes at the end of the process
(b) Reduction of chromosomal number of half during metaphase
(c) Reduction of chromosomal number at the end
(d) Distribution of same number of chromosomes in daughter cells
41. The mitotic spindle forms in—
(a) Amitotic division
(b) Mitotic division only
(c) Mitotic and meiotic division
(d) Meiotic division only
42. During mitosis, anaphase differs from metaphases in having—
(a) Half the number of chromatids in each chromosomes
(b) Half the number of chromosomes, but double the number of chromatids in each chromosomes
(c) Half the number of chromosomes and half the number of chromatids in each chromosomes
(d) Half the number of chromosomes
43. Histones and other chromosomal proteins required to be associated with DNA are synthesized—
(a) G1 phase (b) G2 phase
(c) S phase (d) G1 and S phase
44. If meiosis-II fails to occur after meiosis-I, it is—
(a) Brachymitosis (b) Karyokinesis
(c) Dinomitosis (d) None of these
45. The term meiosis was coined by—
(a) Flemming (b) Blackman
(c) Frame and Moore (d) Robertson
46. One of them is wrong.
(a) Euglena – chlorophyll
(b) Trypanosoma gambiense Endoparasite
(c) Entamoeba gingivalis – Dysentery
(d) None of the above
47. Paramecium is subjected to a weak electric current. It moves towards—
(a) Cathode (b) Anode
(c) Both of these (d) None of these
48. Paramecia in toxic substance produce by—
(a) Plasmodium
(b) Pelomyxa
(c) Paramecium with kappa particles
(d) All of the above
49. In an active moving Amoeba, the solution of Plasminogen would normally occurs—
(a) At the hinder end
(b) At the front side
(c) Around the food vacuole
(d) All of these
50. Infective stage of Plasmodium is—
(a) Sporozoites (b) Merozoites
(c) Ookinete (d) Gametes
