Biology CH. 12

question

What would have happened if Avery had added an enzyme that digested all the nucleic acids to the mixtureof heat-killed bacteria, added the mixture to harmeless bacteria, and injected the mixture into mice?
answer

The harmless bacteria would not have been transformed, and the mice would have died.
question

What is inside of Bacteriophage?
answer

Nucleicacid
question

in what way is DNA like a book?
answer

DNA has stored information , that can be compied and passed on.
question

In which cells is the accurate transmission of information most important
answer

Sex cells
question

Which is a nucleotide found in DNA
answer

Deoxyribose+phosphate group+ cytosine
question

TaBased on chargaff’s rule, the percentages of guannine bases in chicken DNA should be arounnd___ if A is 28.8?
answer

21.5
question

The percentage of cytosine in DNA of the bacterium, s.Lutea should be around___ if a is 13.4
answer

36.6
question

Which scientist made x-ray diffraction photos of DNA
answer

Franklin
question

What is the chronological order of the importantdiscoveries in the structure of DNA?
answer

Chargarr’s ratios fo nucleotides -> franklin x-ray photo-> watson and crick double helix
question

Watson and crick discovered the two strands in DNA
answer

Run is opposite directions
question

Which bacteria killed the mice in Griffin’s transformation experiment?
answer

Live, harmless bacteria and heat-killed, harmful bacteria
question

Griffith called the process he observed transformation because
answer

The harmless bacteria had been transformed.
question

What did avery conclude caused transformation?
answer

DNA was the transforming factor.
question

What do bacteriophages infect?
answer

Viruses
question

What did hershey an chase label the viral DNA with radioactive phosphorous and not radioactive sulfur?
answer

DNA contains phosphorus and no sulfur.
question

Which part fo the bacteriophage in the figure of bacteria contains genetic material?
answer

B big head thing with the noodles
question

What stores information in a cell
answer

DNA
question

Fig. 12-2 shows the sturcture of a
answer

DNA molecule
question

Because of base pairing in DNA the percentage of____
answer

Adenine molecules in DNA is much greater than the percentage of thymine molecules.
question

Which two bases pair together in DNA
answer

Cytosine and guanine
question

what would Hershey and Chase have concluded if both radioactive 32P and 35S were found in the bacteria in the experiment?
answer

Both viurs’s protein coat and its DNA wereInjected into the bacteria
question

Bacteriophages inject ______ into bacteria, altering the bacteria’s genetic information
answer

DNA genetic Material
question

DNA is a nucleic acid made up of _______ joind into long strands or chains by covalent bonds
answer

Nucleotoides
question

The three parts of a DNA ncleotide are the phosphate group, Deoxyribose, and the ____
answer

Base
question

When ______ Destroyed the DNA in his mixture containing various molecules from heat-killed bacteria, transformation no longer Occured
answer

Griffith
question

Watson and crick discovered that _______ bonds hold base pairs together at the center of a strand of DNA.
answer

Hydrogen
question

The Watson and crick model of DNA is a_______ in which two strands are wound around each other
answer

Double Helix
question

In fig. 12-8 , the percentage of guanine would be ____
answer

20%
question

DNA replication results in two DNA molecules…
answer

Each with on e new strand and one original strand.
question

In fig 12-5 what is adding the base pairs to the strand?
answer

DNA polymerase
question

In eukaryotes, DNA…
answer

Is located in the nucleus.
question

In both prokaryotes and eukaryotes, how many copies of the chromosome are left after replication?
answer

2
question

Which would be greater in a eukaryote than in a prokaryote?
answer

The number of replication forks ona strand of DNA
question

The Replication of DNA molecule results in ____ copies of teh same gene.
answer

2
question

DNA is tightly wrapped around ______
answer

Histones
question

In eukaryotes, DNA replcation proceeds in ____direction(s) along the DNA molecule.
answer

Two
question

The tips of chromosomes are known as___
answer

Telomeres
question

During DNA replication, what two processes must occure before the two strands of DNA molecule can separate?
answer

The hydrogen bonds between the base pairs must be broken, and the molecule must unwind.

Get instant access to
all materials

Become a Member