BioBeyond Making Protiens Exam| Questions Solved with Verified Answers
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BioBeyond Making Protiens Exam|
Questions Solved with Verified
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You have seen that DNA is double-stranded, but only one strand is used to make mRNA. Which of the
following is the most likely reason the second strand is evolutionarily conserved? - The second
strand provides stability and...
BioBeyond Making Protiens Exam|
Questions Solved with Verified
Answers
You have seen that DNA is double-stranded, but only one strand is used to make mRNA. Which of the
following is the most likely reason the second strand is evolutionarily conserved? - ✔✔The second
strand provides stability and redundancy for DNA
How many different possibilities are there for a single base in mRNA? It may help to write them out
using the single letter codes above. - ✔✔4
Are there enough possibilities to make the 20 different amino acid combinations using a single base? -
✔✔No
What if mRNA used a group of two bases to store the information? How many different possibilities are
there for a group of two bases in mRNA? It may help to write them out using the single letter codes
above. For example, a pair of bases could be AA, AU, AG, AC, and so forth. - ✔✔16
Are there enough possibilities to make the 20 different amino acid combinations using two bases? -
✔✔No
Where do you think it is least likely for an error to change the amino acid encoded? -
✔✔Third position
In which organelle, in both prokaryotes and eukaryotes, does this process occur? - ✔✔Ribosome
From this diagram, what characteristics can you observe about the structure of the ribosome? Select all
that apply. - ✔✔It is made of two pieces of different size.
The mRNA binds between pieces of the ribosome.
, Only one piece of the ribosome has places inside of it where polypeptides are built.
Molecules aside from the ribosome and mRNA are needed to make polypeptides.
Suppose this tRNA was for the start codon, which reads 5' - AUG - 3' and inserts the amino acid
methionine. The portion in black in the diagram is called the anticodon and binds to the codon to ensure
the right amino acid is brought in. What would the anticodon sequence of this tRNA molecule be to
ensure bonding to the mRNA sequence AUG? - ✔✔UAC
Using what you see in the animation, put the steps of translation in order below. - ✔✔First
tRNA bonds and ribosomes assembles around mRNA
A new tRNA enters the ribosomes
Polypeptide binds to newest tRNA
Chaperone protein pushes ribosome along mRNA
Polypeptide disconnects from oldest tRNA
Oldest tRNA ejected
5' - AUG AUA UUU UAC GGC - 3' - ✔✔Met, Ile, Phe, Tyr, Gly
mRNA: - ✔✔AUG GGU UUA UAU GCG CCU AAU AGU AUU UGA
Translate the mRNA sequence into a polypeptide by dragging the appropriate amino acids into the
area below. - ✔✔Met, Gly, Leu, Tyr, Ala, Pro, Asn, Ser, Ile, STOP
What do you notice about each polypeptide? - ✔✔They are all folded into complex shapes
How many polypeptides do you see in hemoglobin? - ✔✔Four
However, in humans, there are hundreds of thousands of proteins but only about 20,000 genes.
What does this mean? - ✔✔Some genes encode multiple proteins
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