Download Membranes Review

Biology 1010
Extra Credit and Review
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1. A cell is sitting in a concentrated salt solution. Water is moving out of the cell into the solution. This
means the solution must be
a. Hypertonic
b. In equilibrium
c. Isotonic
d. Hypotonic
2. Which of the following mechanisms requires the cell to use energy?
a. Facilitated diffusion
b. Osmosis
c. Diffusion
d. Exocytosis
3. Some unicellular organisms form a water vacuole by the cell membrane pinching inward. This process is
called
a. Phagocytosis
b. Osmosis
c. Pinocytosis
d. Facilitated transport
4. Osmosis is a process that
a. Involves the movement of solutes from unsaturated solutions to saturated solutions
b. Moves water from an area of higher concentration to lower concentration using energy
c. Involves the active transport of dissolved solids
d. Equalizes the concentration of particles by moving water molecules
5. White blood cells consume bacteria that invade the body. This process is called
a. Exocytosis
b. Phagocytosis
c. Pinocytosis
d. Facilitated transport
6. You have 2 beakers labeled X and Y. One beaker contains distilled water and the other contains a salt
solution of a higher concentration than a living cell. You place some protozoans into both solutions. The
ones in beaker X shrivel. The ones in beaker Y swell and burst. These results indicate that
a. Solution X is hypertonic to the protozoans
b. Solution Y is the salt water
c. Solution X is isotonic to the protozoans
d. Solution Y is isotonic to the protozoan
7. Many molecules are too large to pass through the cell membrane and require a passageway. This channel is
created by
a. Carbohydrates on the cell membrane
b. Lipids in the cell membrane
c. Hormones attached to receptors in the cell membrane
d. Proteins in the cell membrane
8. A student using a microscope observes a cell and correctly decides that it is a plant cell because
a. Ribosomes are visible
b. An endoplasmic reticulum can be seen
c. A cell membrane is present
d. It has a large central vacuole
9. Membranes are components of all of the following structures EXCEPT
a. Microtubule
b. Nucleus
c. Golgi apparatus
d. Mitochondrion
10. Prokaryotic and eukaryotic cells have which of the following features in common?
a. A membrane bound nucleus
b. A cell wall made of cellulose
c. Ribosomes
d. Linear chromosomes made up of DNA and proteins
11. All of the following are typical components of the cell membrane of a eukaryotic cell EXCEPT
a. Glycoproteins
b. Cytochromes
c. Cholesterol
d. Phospholipids
12. Which of the following organelles modifies and packages the materials produced by the ribosomes?
a. The Golgi apparatus
b. The nucleus
c. The nucleolus
d. The mitochondrion
13. Which of the following is possible to observe with a light microscope?
a. A nucleus
b. A virus
c. A phospholipid
d. A ribosome
14. A dialysis tube bag is filled with a mixture of 3% starch and 3% glucose and placed in a beaker of distilled
water. After an hour glucose is found in the beaker but starch is not. Which of these is true?
a. The initial concentration of glucose and starch could not have been equal
b. The pores in the bag are larger than the glucose molecule but smaller than the starch molecule
c. The bag is not permeable
d. A net movement of water into the beaker has occurred
15. Which sequence below shows the correct order of events in the cell cycle?
a. G1 to G2 to S to M to cytokinesis
b. G1 to M to G2 to S to cytokinesis
c. G1 to S to M to G2 to cytokinesis
d. G1 to S to G2 to M to cytokinesis
16. The stage of the cell cycle where the cell is replicating its DNA is
a. G1
b. S
c. M
d. G2
17. Differences in plant and animal cell division are seen mainly in
a. Prophase
b. Metaphase
c. Anaphase
d. Cytokinesis
18. Which of the following statements is NOT true of events in mitosis?
a. A single nucleus gives rise to two daughter nuclei
b. Daughter nuclei are genetically identical
c. The centromeres pull apart at the beginning of anaphase
d. Homologous chromosomes may cross over in prophase
19. Cytokinesis in a plant is characterized by
a. The equal division of homologous chromosomes
b. Pinching off of the cell membrane to divide the cell
c. The formation of a cell plate in the cytoplasm
d. The movement of chromosomes from the equator to the poles
20. A human cell has 46 total or 23 pairs of chromosomes. Following mitosis, the daughter cells would each
have a total of _____ chromosomes. After meiosis I, the two daughter cells would have _____
chromosomes, and after meiosis II ______ chromosomes.
a. 46, 46, 46
b. 46, 23, 23
c. 23, 23, 23
d. 46, 12, 12
21. Some organisms are capable of doing asexual and sexual reproduction. Under favorable conditions
reproduction proceeds asexually. When conditions become more stressful reproduction switches to a
sexual mode. What is the best reason why?
a. Sexual reproduction is simple and more rapid allowing larger numbers of offspring to be produced
b. Sexual reproduction requires two separate individuals who can mutually provide food to offspring
during stressful conditions
c. Asexual reproduction requires more energy than sexual does
d. Sexual reproduction produces individuals with new combinations of chromosomes increasing
diversity and the chance of survival
22. Coral in the ocean grows by budding, which is where a new organism grows out of the side of the old one
by mitosis. This form of replication is an example of:
a. Meiosis to produce a zygote
b. Asexual reproduction
c. Sexual reproduction
d. Gamete formation
23. __________ most closely resembles mitosis except that the cells are _______.
a. Meiosis I, diploid
b. Meiosis II, diploid
c. Meiosis I, haploid
d. Meiosis II, haploid
24. Which of the following is true about enzymes?
a. they are changed by the reactions they are involved in
b. they increase the activation energy of the reaction
c. they strengthen the chemical bonds holding the substrate together
d. they are sensitive to changes in pH or temperature
25. Which of these macromolecules is the main component of all cell membranes?
a. DNA
b. phospholipids
c. carbohydrates
d. glucose
26. All of the following molecules are polymers of glucose EXCEPT
a. cellulose
b. starch
c. protein
d. maltose
27. Which of the following best describes the type of reaction in this equation: A + B + energy  C
a. catabolism
b. oxidation-reduction
c. exergonic
d. endergonic
28. Which macromolecule is involved in all of these functions: a structural part of a cell, an enzyme, or cell
movement?
a. carbohydrates
b. lipids
c. proteins
d. nucleic acid
29. Which of these is the most important function of nucleic acids?
a. catalyzing chemical reactions
b. storing energy
c. storing the information needed to make proteins
d. forming a barrier between the cell and the outside environment
30. An organic compound that is composed of carbon, hydrogen and oxygen in a 1:2:1 ratio is known as a
a. lipid
b. carbohydrate
c. nucleic acid
d. protein
Find the term that best describes the type of bonding below.
covalent bond, peptide bonding, hydrogen bonding, polar covalent bond, ionic bond,
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