Cell The Unit Of Life

Q1. Who proposed the fluid mosaic model of plasma membrane?

1. Benda.
2. Schleiden and Schwann.
3. Singer and Nicolson.
4. Robert Brown.

Q2. Select one which is not true for ribosome:

1. Made of two sub-units.
2. Form polysome.
3. May attach to m+RNA.
4. Have no role in protein synthesis.

Q3. The fluidity of membranes in a plant in cold weather may be maintained by:

1. Increasing the number of phospholipids with unsaturated hydrocarbon tails.
2. Increasing the proportion of integral proteins.
3. Increasing concentration of cholesterol in membrane.
4. Increasing the number of phospholipids with saturated hydrocarbon tail.

Q4. Which of the following organisms have a prokaryotic cell?

1. Cyanobacteria.
2. Algae.
3. Fungi.
4. Amoeba.

Q5. The cell organelle not included in the endomembrane system, is:

1. Endoplasmic reticulum.
2. Lysosomes.
3. Mitochondria.
4. Golgi apparatus.

Q6. In chloroplasts, chlorophyll is present in the.

1. Outer membrane.
2. Inner membrane.
3. Thylakoids.
4. Stroma.

Q7. Which of the following cell organelle remains enveloped by a single unit membrane?

1. Lysosomes.
2. Chloroplast.
3. Mitochondria.
4. Nucleus.

Q8. Smooth endoplasmic reticulum is well developed in the cells which synthesize.

1. Steroids.
2. Carbohydrates.
3. Proteins.
4. All of these.

Q9. Quasi-fluid nature of membrane is due to:

1. Phospholipid.
2. Peripheral protein.
3. Integral protein.
4. Sugar moiety

Q10. Cell recognition and adhesion are facilitated by components of plasma membrane. These components are
generally.

1. Glycolipids and glycoproteins.
2. Both lipids and proteins.
3. Protein molecules alone.
4. None of these.

Q11. The main organelle involved in modification and routing of newly synthesized proteins to their destinations is:

1. Chloroplast.
2. Mitochondria.
3. Lysosome.
4. Endoplasmic reticulum.

Q12. Resolution power is the ability to:

1. Distinguish two trees.
2. Distinguish two close objects.
3. Distinguish amongst organelles.
4. Magnify image.

Q13. Which organelle is also known as the ‘suicide bag of the cell’?

1. ER.
2. Lysosome.
3. Vacuole.
4. Plastid.

Q14. Which of the following plastids stores proteins?

1. Amyloplasts.
2. Elaioplasts.
3. Aleuroplasts.
4. Chloroplasts.

Q15. In which one of the following is nitrogen not a constituent?

1. Pepsin.
2. Idioblast.
3. Bacteriochlorophyll.
4. Invertase.

Q16. Which of the following stains is not used for staining chromosomes?

1. Basic Fuchsin.
2. Safranin.
3. Methylene green.
4. Armine.

Q17. Select the wrong statement from the following:

1. Both chloroplasts and mitochondria contain an inner and an outer membrane.
2. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the
   thylakoid membrane.
3. Both chloroplasts and mitochondria contain DNA.
4. The chloroplasts are generally much larger than mitochondria.

Q18. The outer layer of vacuole is called:

1. Tonoplast.
2. Leucoplast.
3. Cell wall.
4. Plasmalayer.

Q19. The cell organelle which lacks a membrane boundary:

1. Chloroplast.
2. Golgi body.
3. Ribosome.
4. Mitochondria.

Q20. Which of the following plastids stores starch?

1. Amyloplasts.
2. Elaioplasts.
3. Aleuroplasts.
4. Chloroplasts.

Q21. Electron microscope has a high resolution power. This is due to:

1. Electromagnetic lenses.
2. Very low wavelength of electron beam.
3. Low wavelength of light source used.
4. High numerical aperture of glass lenses used.

Q22. Which of the following is part of endomembrane system?

1. Mitochondria.
2. Chloroplast.
3. Chromosome.
4. Vacuole.

Q23. Binding of specific protein on regulatory DNA sequence can be studied by means of:

1. Ultra centrifugation.
2. Electron microscope.
3. Light microscope.
4. X-rays crystallography.

Q24. Protein synthesis in an animal cell takes place.

1. Only in cytoplasm.
2. In the nucleolus as well as in the cytoplasm.
3. In the cytoplasm as well as in mitochondria.
4. Only on ribosomes attached to nucleus.

Q25. Golgi apparatus is absent in:

1. Higher plants.
2. Yeast.
3. Bacteria and blue-green algae.
4. None of the above.

Q26. Oxysomes or F-F particles occur on:

1. Thylakoids.
2. Mitochondrial surface.
3. Inner mitochondrial membrane.
4. Chloroplast surface.

Q27. The proteins are synthesized at:

1. Ribosomes.
2. Mitochondria.
3. Centrosomes.
4. Golgi bodies.

Q28. Cell secretion is done by:

1. Plastids
2. ER
3. Golgi apparatus
4. Nucleolus

Q29. All plastids have similar structure because they can:

1. Store starch, lipids and proteins.
2. Get transformed from one type to another.
3. Perform same function.
4. Be present together.

Q30. The desmosomes are concerned with.

1. Cytolysis.
2. Cell division.
3. Cell adherence.
4. Cellular excretion.