Question and Answers: cell

1. The cell which attack and destroy virus is

B cell T cell Nutrophil Basophil

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2. Number of rod cells seen in retina of eye is

7 million 120 million 16 million 20 million

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3. Power house of the cell

Chloroplast Nucleus Mitochondria Lysosome

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4. Which is called as Suicidal bags of the cell

Lysosome Centrosome Vacuole Chromosome

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5. Cell theory was introduced by

Sehleiden Crick Schwann both a and c

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6. Which one of the following is involved in formation of spindle fibres during cell division

Nucleus Centrosome Lysosome None

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7. Which one is called Factory of the cell

Nucleus Cell Mitochondria Ribosomes

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8. The spherical organelle which controls the activities of the cell is

Nucleus Lysosome Ribosome None

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9. Which one of the following cell that does not contain nucleus

Nerve cell Blood cell RBC None

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10. It gives shape and protection to plant cell

Plasma membrane Cell wall Both a and b Cytoplasm

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11. It distributes the nutrients within the cell

Cell wall Cytoplasm Ribosome Vacuoles

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12. Which one is the Longest cell

Bone cell Nerve cell Cell of muscle Blood cell

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13. The organelle which found only in animal cell is

Mitochondria Centrosome Plasma membrane Chloroplast

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14. A plant cell differs from a animal cell due to the presence of

Cell membrane Plasma membrane Cell wall None

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15. Pick out the energy currency of the cell

FAD NADP NAD ATP

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16. The study of structure and function of the cell is called

Botany Cytology Micro Bio-technology

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17. The cells having dense cytoplasm and large nucleus are called

Simple tissue Miristamatic tissue Component tissue None

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18. What are the causes for Hypoxia?
A. Plant nutrients entering river, lake and oceans during Eutrophication result in phytoplankton blooms. Dense population of phytoplankton bloom reduces Dissolved oxygen during night by respiration
B. With no support from dissolved oxygen, phytoplankton cell die, sink towards bottom and later decomposed by bacteria. Fish and certain invertebrates like crabs and clams on bottom are killed by hypoxic conditions
Choose the correct codes from the given below

A only B only Both A and B Neither A nor B

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19. This substance is present in the cell walls of Gram Positive bacteria only

Peptidoglycan Lipopolysaccharides Teichoic acids None of these

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20. Which of the following is a part of endomembrane system of eukaryotic cell

Peroxisomes Chloroplasts Mitochondria Golgi complexes

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21. Which one of the following is wrong for fungi?

They are both unicellular and multicellular. They are eukaryotic. All fungi possess a purely cellulosic cell wall. They are heterotrophic

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22. The balloon-shaped structures called tyloses

are linked to the ascent of sap through xylem vessels originate in the lumen of vessels characterize the sapwood are extensions of xylem parenchyma cells into vessels

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23. Select the mismatch.

Methanogens-Prokaryotes Gas vacuoles-Green bacteria Large central vacuoles-Animal cells Protists-Eukaryotes

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24. Select the wrong statement.

Mycoplasma is a wall-less microorganism. Bacterial cell wall is made up of peptidoglycan. Pili and fimbriae are mainly involved in motility of bacterial cells. Cyanobacteria lack flagellated cells.

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25. A cell organelle containing hydrolytic enzymes is

mesosome lysosome microsome ribosome

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26. During cell growth, DNA synthesis takes place in

M phase S Phase G1 phase G2 phase

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27. In majority of angiosperms

a small central cell is present in the embryo sac egg has a filiform apparatus there are numerous antipodal cells reduction division occurs in the megaspore mother cells

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28. When cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

Both G2 / M and M G1 / S G2 / M M

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29. Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

Thrombocytes Erythrocytes Leucocytes Neutrophils

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30. Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilization.

Gastrin Insulin Glucagon Secretin

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31. If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?

Nature of stored food materials in the cell Types of pigments present in the cell Chemical composition of the cell wall Structural organization of thallus

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32. Which cells within the microsporangia undergo meiosis and produce microspores.

Zygotic cells Spore mother cells Archegonial cells Antheridial cells

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33. algae have cell wall made up of

Hemicellulose, pectins and proteins Cellulose, galactans and mannans Cellulose, hemicellulose and pectins Pectins, cellulose and proteins

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34. transgenic plants are the ones

Grown in artificial medium after hybridization in the field Produced by a somatic embryo in artificial medium Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell Produced after protoplast fusion in artificial medium

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35. Sieve tubes and companion cells are absent in

Mango Pea Angiosperms Pteridophyta

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36. Two adjacent filaments of spirogyra affinis each 10 cells participating in reproduction. How many new spirogyra plants are produced during sexual reproduction?

5 10 20 40

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37. The ______ are undifferentiated embryonic cells and produce the sex cells as well.

Thesocytes Myocytes Archaeocytes Chromocytes

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38. Collar cells are general characteristic of

Sand worm Roundworms Coelenterata Sponges

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39. The cells absent in gastrodermis of Hydra are

Gland cells Stinging cells Nutritive cells Nerve cells

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40. Cell tissue grade of organization occurs in

Platyhelminthes Sponges Protozoa Coelenterata

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41. Earthworms eliminate cellular wastes and excess water through excretory tubules called ______.

Nephridia Flame cells Coelom Gizzard

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42. Cnidarians having cells called cnidocytes, contain organelles known as ______.

Polymorphism Nematocysts Hermaphroditism None of these

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43. viruses are no more "alive" than isolated chromosomes because

They both require oxygen for respiration They both need food molecules They require both RNA and DNA Both require the environment of a cell to replicate

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44. chromosomes in a bacterial cell can be 1 - 3 in number and

can be either circular or linear, but never both within the same cell can be circular as well as linear within the same cell are always linear are always circular

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45. How does enveloped virus enter into host cells?

by phagocytosis by contact with ceil receptor and endocytosis by injecting its own nucleic acid inside the host cells by fusion with the plasma membrane of host

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46. Cell wall of Gram positive bacteria is made up of

Murein Cellulose Lipid and protein Cellulose and lipid

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47. virus are living, because

Carry metabolic activity Carry anaerobic respiration Multiply in host cells Cause infection

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48. The asexual spores formed by Colletotrichum falcatum, Sphaerotheca and rhizopus stolonifer are

Many celled One celled Pyriform in shape Rod shaped

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49. Identify the correct pair of events when temperate phages infect bacteria :
(I) No prophages are formed.
(II) bacterial cell undergoes many divisions
(III) bacterial cell undergoes immediate lysis
(IV) Prophages are formed
The correct pair is

I, II II, III III, IV II, IV

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50. In aids, HIV kills

Bone-Marrow cells T-Helper cell Antibody molecule T-Cytotoxic cell

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