Bio 101 Test 4
A population of ground squirrels has an annual per capita birth rate of .03 and an annual per capita death rate of 0.04. Calculate an estimate of the number of individuals added to (or lost from) a population of 1,000 individuals added
10 individuals lost
Cytosine makes up 32% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
18%
A particular triplet of bases in the template strand of DNA is 5'ACG3'. The corresponding codon for the mRNA transcribed is
3'UGA5'
During RNA processing, which of the following are added to help stabilize mRNA by inhibiting its degradation
5' cap and poly (A) tail
A DNA template strand reads 3'TTACGGAC5'. During DNA replication, what specific complementary DNA sequence will be added to the growing new strand?
5'AATGCCTG3'
For the following mRNA strand, indicate the correct polypeptide sequence that will be produced: 3'GCAUCAGCAAGG5'
ALA-SER-ALA-ARG
What does DNA polymerase do in DNA replication?
Adds DNA nucleotides at the 3' end using a DNA template strand to pair complementary baes.
In the figure above, if "x" indicates the location of two closely related species, then fossil of their most likely found in which strata?
C
Suppose you are provided with an actively divided culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base?
DNA in both daughter cells be radioactive.
A new DNA strand elongates only in the 5' to 3' direction because...
DNA polymerase can only add nucleotides to the free 3' end
In translation, what is the function of the release factor(RF)?
It binds to the stop codon in the A site in place of a tRNA.
Characteristic that an organism acquires during their lifetime are not normally inherited offspring. Which of the following scientists came up with the idea of "inheritance of acquired characteristics?"
Jean-Baptiste de Lamarck
A point mutation occurs, changing the DNA template strand from 3'CTG5' to 3'CTC5'. What type of mutation is this?
Missense
Which of the following best describes Chargaff's base-pair bonding rules?
Pyrimidines always bind to purines
What does Ligase do in DNA replication?
Repairs any breaks in the sugar-phosphate backbone; joins okazaki fragments.
Which of the following point mutations is most likely to have no effect on the final protein product?
a silent mutation
Group of different species, living in the same local area, and can interacting with one another is a ____________.
community
a "J-shaped" growth curve indicates
exponential growth
What kind of chemical bond is found between paired bases of DNA double helix?
hydrogen
Natural selection is based on all the following except __________.
individuals adapt to their environments and, thereby, evolve.
What effect will the mutation describe in Question #19 have on the polypeptide strand that is synthesized from it?
it will change an amino acid. The amino acid "ASP" will be changed to "GLU"
A group of individuals of the same species that live in the same species that live in the same local area and can interbreed to produce fertile offspring is a _____________.
population
One gene codes for one
protein
a group of mice live in a corn field. Which of the following is a correct list of biotic factors that can impact this mice population?
snakes, owls, corn
A large population of field mice is decimated by the flooding of the habitat. Over 90% of the mice die in the flood. Now, only a few mice are left. By chance, only brown-furred mice survived, and all of the black-furred and white-furred mice perished in the flood. What is this an example of?
the bottleneck effect
As N approaches K for a certain population, which of the following is predicted by the logistic equation?
the growth rate will approach zero.
During DNA replication, the DNA strand that is synthesized as short okazaki fragment is called the
the lagging strand
Carrying capacity is ________________.
the maximum population size that a particular environment can support.
What determines the nucleotide sequence of the newly synthesized strand during DNA replication?
the nucleotide sequence of the template strand
DNA replication is called semiconservative because...
the two resulting DNA molecules each have one new DNA strand and one old strand from the original DNA molecule
An RNA copy of the DNA template strand is made. The describes the process of _______________. Which takes place in the _______________.
transcription; nucleus
The type of RNA that brings the correct amino acid to the ribosome so it can be added to the growing polypeptide chain is ________________ RNA.
transfer
Which of the following processes does not occur within the nucleus?
translation
What does Helicase do in DNA replication?
unwinds the DNA polymerase
