Biology 1 - Chapter 12: Gene Expression at the Molecular
Level I: Production of mRNAs and Proteins Questions With
Complete Solutions
Are all three forms of RNA involved in the process of
translation? Correct Answers Yes
Are RNA nucleotides added in the same direction as in DNA
replication? Correct Answers Yes, 5' >>> 3'
Because each codon is comprised of 3 bases, what must the
number of nucleotides making up a genetic message be? Correct
Answers Three times the number of amino acids making up the
protein product
Can each tRNA be used repeatedly? Correct Answers Yes, pick
up its designated amino acid in the cytosol, deposits the amino
acid at the ribosome, and returns to the cytosol to pick up
another copy of that same amino acid
How is RNA different from DNA, though it is chemically
similar? Correct Answers Contains ribose as its sugar instead of
deoxyribose
Substitutes the nitrogenous base uracil for thymine
Generally consists of a single strand instead of two
There are many different types of RNA molecules, each having
a different function
How is the code read? Correct Answers Continuously; the first
group of three nucleotides specifies the first amino acid, the next
, group of three nucleotides specifies the second amino acid, and
so forth
How long does a ribosome require to translate an average-sized
mRNA into a protein? Correct Answers Less than a minute
How many nucleotides would it take to code for a protein that is
300 amino acids long? Correct Answers 900
How many of 64 codons specify an amino acid? Correct
Answers 61
True or false? More than one codon can specify the same amino
acid. Correct Answers True
What about transcription is unlike DNA replication? Correct
Answers Only a small stretch of DNA (i.e. a gene) is used as
the template to synthesize RNA
Only one strand of the DNA is as the template used
Uracil is put in the place of thymine, there are no thymines in
RNA
RNA polymerase catalyzes nucleotide addition
The product is a single strand of RNA
What are all forms of RNA transcribed from? Correct Answers
Specific genes in the nucleus
What are anticodons? Correct Answers Complementary to
codons in the mRNA sequence and can thus base pair with the
mRNA nucleotides
Level I: Production of mRNAs and Proteins Questions With
Complete Solutions
Are all three forms of RNA involved in the process of
translation? Correct Answers Yes
Are RNA nucleotides added in the same direction as in DNA
replication? Correct Answers Yes, 5' >>> 3'
Because each codon is comprised of 3 bases, what must the
number of nucleotides making up a genetic message be? Correct
Answers Three times the number of amino acids making up the
protein product
Can each tRNA be used repeatedly? Correct Answers Yes, pick
up its designated amino acid in the cytosol, deposits the amino
acid at the ribosome, and returns to the cytosol to pick up
another copy of that same amino acid
How is RNA different from DNA, though it is chemically
similar? Correct Answers Contains ribose as its sugar instead of
deoxyribose
Substitutes the nitrogenous base uracil for thymine
Generally consists of a single strand instead of two
There are many different types of RNA molecules, each having
a different function
How is the code read? Correct Answers Continuously; the first
group of three nucleotides specifies the first amino acid, the next
, group of three nucleotides specifies the second amino acid, and
so forth
How long does a ribosome require to translate an average-sized
mRNA into a protein? Correct Answers Less than a minute
How many nucleotides would it take to code for a protein that is
300 amino acids long? Correct Answers 900
How many of 64 codons specify an amino acid? Correct
Answers 61
True or false? More than one codon can specify the same amino
acid. Correct Answers True
What about transcription is unlike DNA replication? Correct
Answers Only a small stretch of DNA (i.e. a gene) is used as
the template to synthesize RNA
Only one strand of the DNA is as the template used
Uracil is put in the place of thymine, there are no thymines in
RNA
RNA polymerase catalyzes nucleotide addition
The product is a single strand of RNA
What are all forms of RNA transcribed from? Correct Answers
Specific genes in the nucleus
What are anticodons? Correct Answers Complementary to
codons in the mRNA sequence and can thus base pair with the
mRNA nucleotides
