WGU C785 Biochem – Module 1 – All Questions
DNA replication is semiconservative, which allows each of the 2 strands to serve as a template
for the new strands – ✔✔true
Recall that the DNA polymerase must bind a double-stranded polymer before it can start making
its own DNA polymer. What helps the DNA polymerase to overcome this problem in DNA
replication? – ✔✔RNA primers
Several components of cigarette smoke, including benzopyrene, insert themselves into the DNA
and lead to several types of mutations such as frameshift mutations, including both insertions and
deletion. Which repair pathway would be used to repair this type of damage? – ✔✔Nucleotide
Excision Repair
Maternal smoking during pregnancy is hazardous yet common in many places. Many studies
have associated prenatal smoking to unhealthy physical and psychological outcomes for the
baby. Researchers know that maternal smoking affects are epigenetic in nature. Which event can
be considered epigenetic in nature? – ✔✔Changes in chromatin structure
Blood is what type of inheritance? – ✔✔codominance
What is the probability that a child will have an autosomal dominant disease if their father is
heterozygous for the allele and their mother is homozygous for the normal allelle? – ✔✔50%
What is the complementary DNA strand for the DNA sequence 5′-ATT CGG GCT CCC – 3′ –
✔✔5′- GGG AGC CCG AAT – 3′
A research scientist is trying to create a new strain of bacteria that can produce a protein needed
for her research. What molecule will act as a template in creating the new protein? –
✔✔messenger RNA (mRNA)
What is 1 direct effect of inhibiting translation? – ✔✔the production of proteins would stop
How many amino acids, and which ones, would be encoded by the following mRNA sequence:
5′- AUGACUCCCGGG -3′ – ✔✔4: MET, THR, PRO, GLY
Promoters are DNA sequences near the start of a gene that are recognized by transcription
factors which recruit RNA polymerase to that gene for expression. This is an important aspect of
transcriptions but not part of the mRNA processing. – ✔✔true
You are designing a piece of DNA for a project and must select the appropriate nitrogenous
bases. Which combination of nitrogenous bases would you find most suitable for your work? –
✔✔Adenine, Guanine, Thymine, Cytosine