Pop Quiz 1
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- 1.If a plant cell is placed in a drop of concentrated sucrose solution on a slide and viewed under a microscope, you would most likely observe the _____________.
- A.
Destruction of the membrane around the vacuole
- B.
Shrinkage of the cytoplasm
- C.
Rupturing of the cell wal
- D.
Cell swelling
- 2.Photographic film is covered with a dark layer of protein. Removal of the protein makes the film clear and become transparent. Strips of photographic film were placed in the following solutions. In which solution would the photographic film turn clear?
- A.
Pepsin alone.
- B.
Hydrochloric acid, at pH 2.
- C.
Pepsin and hydrochloric acid, at pH 2.
- D.
Pepsin and sodium hydroxide, at pH 8.
- 3.Which of the following will occur when water leaves the guard cells to the surrounding epidermal cells?
- A.
The stomata pore will decrease in diameter.
- B.
Photosynthesis will cease in the guard cells.
- C.
The guard cells will shrink and crenate.
- D.
The plant will wilt.
- 4.Both plant and animal cells have _________________.
- A.
Large central vacuoles and endoplasmic reticulum
- B.
Mitochondria and ribosomes
- C.
Cell walls and mitochondria
- D.
Nuclei and chloroplasts
- 5.Which of the following are cells which are specially adapted for absorption of substances?
- A.
Muscle cell and cortex cell
- B.
Xylem tissue and nerve cell
- C.
Red blood cell and root hair cell
- D.
Intestinal epithelial cell and islets of Langerhans
- 6.When 1.0 cm3 of human bile was added to 5.0 cm3 of milk in a test-tube which also contained a few drops of universal indicator solution, the colour change indicated an increase in pH. Which one of the following functions and properties of bile accounts for the change in pH?
- A.
Bile contains alkaline salts.
- B.
Bile has a high optimum pH.
- C.
Bile hydrolyses lipids and releases fatty acids.
- D.
Bile emulsifies fats giving them a larger surface area for digestion to occur.
- 7.
- A.
The cell wall bursts.
- B.
The pigment becomes more soluble.
- C.
Chemical energy increases with rise in temperature.
- D.
The cell membrane becomes completely permeable.
- 8.
![An Amoeba
had its nucleus removed by means of a fine glass tube but it was not otherwise
damaged. For several days it continues to move and feed, but it did not reproduce.
An intact Amoeba, used as a control,
reproduced twice in that time. What do you conclude from this experiment about
the role of the nucleus in Amoeba?
- ProProfs]( "An Amoeba
had its nucleus removed by means of a fine glass tube but it was not otherwise
damaged. For several days it continues to move and feed, but it did not reproduce.
An intact Amoeba, used as a control,
reproduced twice in that time. What do you conclude from this experiment about
the role of the nucleus in Amoeba?")
An Amoeba had its nucleus removed by means of a fine glass tube but it was not otherwise damaged. For several days it continues to move and feed, but it did not reproduce. An intact Amoeba, used as a control, reproduced twice in that time. What do you conclude from this experiment about the role of the nucleus in Amoeba?- A.
The nucleus is the only part of the cell to contain DNA.
- B.
The nucleus controls the normal activity of the cell.
- C.
The nucleus is essential for cell division.
- D.
The nucleus is essential for life.
- 9.If a man doubles his daily protein intake in his diet, which of the following conditions would occur?
- A.
A large amount of amino acids would appear in his urine.
- B.
The excess protein is stored in his liver and muscles.
- C.
The urea concentration in his urine increases.
- D.
Proteins would occur in his urine.
- 10.Which of the following statements about the cell is INCORRECT?
- A.
A cell can only undergo cell division when a nucleus is present.
- B.
Active transport can only take place in the presence of mitochondria.
- C.
A plant cell can retain its shape in water due to the presence of a cell wall.
- D.
A nucleus controls all cellular activities and synthesises proteins when needed.
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