Cells+&+Biotech+Answer+Key


 * creeper pirate**1). What type of organism would have this type of cell?

A). Animal B). Plant D). Virus
 * C). Bacteria**

2). A group of students placed spinach leaves in a beaker of water in full sunlight. After several hours, small bubbles appeared on the leaves. These bubbles probably consisted of ___.

A). H 2O C). CO2 D). H2
 * B). O2**

3). Which organism uses this equation to create energy? C 6 H 12 O6 + 6O 2 > 6H2O + 6CO 2

2). Tulip 3). H1N1 virus 4). E-Coli bacteria
 * 1). Koala**

4). How does yeast produce energy?

1). cellular respiration 2). photosynthesis 3). lactic acid fermentation
 * 4). alcoholic fermentation**

5). Which of these is part of a virus?

1). Nucleus 3). Cell Wall 4). Cell Membrane
 * 2). Capsid**

6) Which organism has no nucleus? 1). a plant 2). an animal 4). bacteria 5). no valid answer
 * 3). a virus**

7. What is the relationship between these three structures: protein, cell, DNA? a. DNA is produced by protein which is produced in the cell. b. Protein is composed of DNA which is produced in the cell. d. A cell is composed only of DNA and protein.
 * c. DNA controls the production of protein in the cell.**

8. Which statement about DNA is correct? a. A child’s DNA will be unrelated to the mother’s or father’s DNA. **b. A child’s DNA will show similarities to both the mother’s and father’s DNA.** c. A female child’s DNA will exactly match the mother’s DNA. d. A male child’s DNA will exactly match the father’s DNA.

9. If an intestinal cell in a butterfly contains 24 chromosomes, a butterfly egg cell would contain: a. 3 chromosomes. b. 6 chromosomes. d. 24 chromosomes.
 * c. 12 chromosomes.**

10. Which statement about plant and animal cells is true? a. Plant cells have a nucleus and a cell wall; animal cells do not have either of these structures. c. Plant cells have a cell wall and a cell membrane; animal cells have a cell wall but not a cell membrane. d. Plant cells have chloroplasts and mitochondria; animal cells have chloroplasts but do not have mitochondria.
 * b. Plant cells have a cell wall and chloroplasts; animal cells do not have either of these structures.**

While investigating applications of science knowledge, Willy learned that scientists have used genetic engineering techniques to attach insulin-producing genes to bacterial DNA. These bacteria produce large amounts of scarce human hormones. Scientists predict that hormones produced by bacteria will be inexpensive and will not cause allergic reactions. 11. Scientists developed hormone-producing bacteria because they wanted to: a. learn about bacteria. b. discover a cure for diseases. d. compare the hormones produced by bacteria with hormones produced naturally.
 * c. find a way to increase the supply of hormones for use by humans.**

12. Doctors need to be careful not to give their patients an antibiotic such as penicillin too often. If the same antibiotic is prescribed too many times, it can become less effective against bacteria. Explain fully why this is so. If penicillin is used over and over, most of the bacteria against which it is effective will be killed. Those which have genes that allow them to survive the penicillin will be the only ones left. With little competition (all the other ones are dead), these bacteria will reproduce abundantly, spreading the genes that resist penicillin. Thus, through natural selection, a new breed of bacteria will be created, one which cannot be killed by penicillin and is therefore much more dangerous to humans. However, if some bacteria with non-resistant genes are allowed to survive, the non-resistant genes will continue to circulate through the gene pool and bacteria will not evolve to become penicillin resistant.

13. Which statement about viruses and bacteria is true? a. Bacteria have cell walls and viruses have cell membranes. b. A virus does not have a nucleus, but a bacteria has one. d. Viruses cause diseases while bacteria do not.
 * c. Bacteria can reproduce independently and viruses cannot.**

14. Which statement is not true about cell membranes? a. They are found in plant cells b. They are found in animal cells d. They are semipermeable lipid bilayers
 * c. They surround the nucleus**

15. Which of these is not found in animal cells? a. nucleus b. cytoplasm d. mitochondria
 * c. chloroplast**