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Weekly Quiz 6 (Chapters 11 & 12)
Bio 1200 OU. 100%
Terms in this set (17)
Why were Griffiths' 'S' strains able to produce a polysaccharide coat while the 'R' strains could not?
The 'S' and 'R' strains carry differences in their genetic material
Identify the components of DNA by dragging and dropping the labels to the correct locations on the figure.
google search it,
Assign the correct entries in this table comparing transcription to translation.
Enzyme - RNA polymerase
Template - DNA
Initiation - Promoter
Termination - Terminator sequence
Enzyme - Ribozyme
Template - mRNAInitiation - Start codon
Termination - Stop codon
Match the description with the correct chromosomal structure.
Chromatin - protein-DNA complex;
Histone - individual proteins;
Nucleosome - 146-147;
30nm fiber - a zig zag;
heterachromatic - highly compacted
Which of the following is NOT a criterion for an organism's genetic material?
The genetic material must be dynamic, changing rapidly in response to changes in the environment.
The copying of the information in DNA is efficient because
each strand of a DNA molecule carries complementary information and can be used as a template during replication.
Which of the following statements about RNA processing in eukaryotes is INCORRECT?
The excision of introns from pre-mRNA is the only modification required to produce a mature mRNA.
A difference between bacterial and eukaryotic transcription
in eukaryotes, there are different RNA polymerases (I, II, and III)
Match the experimental procedures and findings with the correct scientific investigators
Grif: Transformed 'R' bacteria into 'S'
- Used DNase, RNase, and protease to try and identify the genetic material
- DNA carries genetic material in Streptococcus bacteria
Insert the correct terms or phrases into the following sentences on RNA modification in eukaryotes.
1. Shortly after.....5' cap is added.
2. In nucleus ....export of the mRNA to the cytosol.
3 In cytosol.....translated.
4. A mature ....polyA tail.
5. In the cytosol....stability.
If a DNA template strand has a sequence of 3′ TACAATGTAGCC 5′, the RNA produced from it will be which sequence?
Suppose actively dividing eukaryotic cells were treated with a chemical that blocks the activity of the enzyme telomerase. What would happen to these cells?
Cells would lose DNA at the ends of the chromosomes over many generations.
Complete the sentences about the process of DNA replication with the correct terms.
a) The replication forks will move in opposite directions as replication proceeds.
b) DNA Helicase seperates DNA double helix strand
c) SSB Protein or Single strand binding protein
d) RNA Primers are the short segments of RNA synthesized.
e) Primase is the enzyme which synthesizes the RNA primers
f) 3I OH is provided by the short RNA segments for replication
g) The new DNA strand is synthesized in the 5I -3I direction
h) Topoisomerase is the enzyme which removes the tightened coils.
i) DNA Polymerase
j) Leading Strand
k) Lagging strand
l) Okazaki fragments
m) DNA Ligase.
Gene expression is the process whereby genetic information in the cell is used to produce proteins. This is referred to as the central dogma. Match the descriptions of the components of gene expression with the correct terms.
Suppose that in Neurospora, an essential molecule is produced from precursors in the following pathway. The letters A, B, and C represent enzymes that are the products of genes a, b, and c:
Precursors --> Intermediate 1 --> Intermediate 2 --> Essential molecule
Assume that 'precursors' are found in minimal growth media. Indicate true or false that the following mutants will grow under the following conditions:
F (mutant for C will only grow in the presence of essential molecule)
F (mutant for B will only grow in the presence of either intermediate 2 and/or essential molecule)
There is only one start codon, AUG. This means that
All newly-made polypeptides have a methionine at their amino end.
A 5'-CUA-3' codon in an mRNA could be recognized by which of the following anticodon sequences in a tRNA?
When you cross two true-breeding pea plants, one with purple flowers and the other with white, their offspring will have:
Why is DNA called "The Blueprint of Life?"
Snapdragon flowers follow the inheritance pattern of incomplete dominance. If a red flowered plant (RR) were crossed with a white flowered plant (R'R'), then their offspring would have
What does a codon consist of?
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A classmate states that continental drift could not be possible because it would take far too much force to move tectonic plates. Describe the hypotheses scientists use to explain the movement of tectonic plates. Which hypothesis do many scientists think may explain the great force needed to move plates?
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