Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Bio Ch 13 Unit Test
| Question | Answer |
|---|---|
| Which bacteria killed the mice in Griffith's transformation experiment? | live, harmless bacteria and heat killed, harmful bacteria |
| Griffith called the process he observed, transformation because____. | the harmful bacteria had been transformed |
| What is inside a bacteriophage? | nucleic acid |
| What do bacteriophages infect? | bacteria |
| What property of DNA does bacterial transformation illustrate? | bacterial dna can move into another bacteria and function |
| What did Avery conclude caused transformation? | dna was the transforming factor |
| What happened when Griffith injected mice with the harmless r-strained bacteria alone? | the mice lived |
| Why did Hershey and Chase label the viral DNA with radioactive phosphorus and not radioactive sulfur? | dna contains phosphorus and no sulfur |
| Which of the following is a nucleotide found in dna? | deoxyribose plus phosphate group plus cytosine |
| e of base pairing in dna, the percentage of ___. | thymine molecules in dna is about equal to the percentage of adenine molecules |
| In which cells is the accurate transmission of information most important? | sex cells |
| What happens when a piece of DNA is missing? | genetic information is lost |
| The table in figure 12.3 shows the results of the percentages of several different organisms. Some are missing, the chicken DNA should be around ___. | 20 |
| Cytosine should be what? | 40 and 40 |
| Dna makes a good molecule for storing information because ___. | its bases can be joined together in any order like the letters of the alphabet can be strung to form different words |
| Rosalind Franklin contributed to the understanding of dna by ___. | producing images of dna molecules by using x-rays |
| Which of the following best describes Rosalind Franklin's contribution to our understanding of the structure of dna? | she purified large amounts of dna stretched the fibers to the strands were parallel and used an x-ray beam to produce an image of the molecule |
| Which scientist figured out that the shape of a dna molecule is a double helix? | watson and crick |
| Which scientist made x-ray diffraction photos of dna? | Franklin |
| Watson and Crick discovered the two strands in dna ___. | run in opposite directions |
| Which of the following forms a base pair with thymine? | Adenine |
| What is the chronological order of the important discoveries in the structure of DNA? | Chargaff’s ratios of nucleotides, Franklin makes an x-ray diffraction photo of DNA, Watson and Crick identify the double helix |
| What would happen to the percentage of G in figure 12.4 of the percentage of A rose to 25%. | drop to 25% |
| The DNA replication results in two DNA molecules____. | Each with one new strand and one original strand. |
| During DNA replication, a DNA strand that has the bases ACGGTA produces a strand with the bases____. | TGCCAT |
| In figure 12.5 what nucleotide is going to be added at .1 opposite from thymine. | Adenine |
| Which of the following include all the others? | Chromosomes |
| What enzyme works to add DNA to ends of chromosomes in rapidly dividing cells such as those found in an embryo to prevent genes from being lost during replication? | DNA Polymerase |
| In figure 12.5 what is adding base pairs to the strand? | DNA Polymerase |
| In both prokaryotes and eukaryotes DNA replication happens____? | Before cell division. |
| In both prokaryotes and eukaryotes how many copies of the chromosome are left after replication? | 2 |
| Which would be greater in a eukaryote than a prokaryote? | The number of replication forks on a strand of DNA |
| Eukaryotic DNA molecules need to be carefully copied and sorted especially in the formation of_____cell during meiosis. | sex cells |
| Eukaryotic DNA has more replication forks than prokaryotic DNA because it has more starting placing or____. | origins of replication |
| The tips of chromosomes are known as____. | telomeres |
| The Watson and Crick model of DNA is a____in which two strands are wound around each other. | double helix |
| _____are weak bonds that hold the two strands of DNA together but also allow the DNA to separate and replicate. | Hydrogen bonds |
| If covalent bonds held the two strands of nucleotides together the two strands could not easily separate and____. | replicate |
| The matching strand to the one in figure 12.7 reading from the bottom up would be_____. | CTGA |
Created by:
P.V.A.