BS 161 exam 1 practice questions with verified answers
_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.
Ans✓✓✓ Nucleotides; amino acids
A cell that is deficient in ribosomes is unable to complete what process?
Ans✓✓✓ translation
A consecutive sequence of codons following a start codon is called a: Ans✓✓✓
reading frame
A double-stranded DNA molecule, only part of which is shown, is being
transcribed. If the molecule is transcribed from left to right, one of the
nucleotides shown in bold would be the first transcribed in this small molecule.
5'—ATGATCGGATCGATCCAT—3'
3'—TACTAGCCTAGCTAGGTA—5'
Which sequence is the correct mRNA produced from the transcription of this DNA
molecule? Ans✓✓✓ 5'-AUGAUCGGAUCGAUCCAU-3'
A fatty acid contains primarily carbon and hydrogen atoms, and its hydrocarbon
tail is very hydrophobic. What kind of interaction can occur between hydrocarbon
tails of fatty acids? Ans✓✓✓ van der waals
A phosphodiester bond in nucleic acid polymers is formed between: Ans✓✓✓ a
hydroxyl on the sugar component of one nucleotide and the phosphate group of
another nucleotide.
, A template DNA strand contains the sequence 3'-ATGCTGAC-5'. The
corresponding sequence in the RNA transcript is: Ans✓✓✓ 5'-UACGACUG-3'.
Adjacent nucleotides in an RNA chain are held together by: Ans✓✓✓
phosphodiester bonds
After translation has been initiated, how long will elongation continue? Ans✓✓✓
until the ribosome reaches a UAA, UAG, or UGA codon
All of the chemical reactions in a cell that are required to sustain life are referred
to as Ans✓✓✓ metabolism.
All of these groups are a component of an amino acid except: Ans✓✓✓ ?
An organism's genome is analyzed and found to contain 18% guanine. What
percentage of that organism's DNA is adenine? Ans✓✓✓ 32%
An RNA transcript is synthesized in which direction? Ans✓✓✓ 5' to 3'
An unsaturated fatty acid contains: Ans✓✓✓ one or more double bonds between
carbon atoms.
As part of their normal function, many proteins bind to DNA briefly and then
release it again. Which types of interactions might be involved in these transient
protein-DNA interactions? Ans✓✓✓ van der waals, ionic, and hydrogen bonding
_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.
Ans✓✓✓ Nucleotides; amino acids
A cell that is deficient in ribosomes is unable to complete what process?
Ans✓✓✓ translation
A consecutive sequence of codons following a start codon is called a: Ans✓✓✓
reading frame
A double-stranded DNA molecule, only part of which is shown, is being
transcribed. If the molecule is transcribed from left to right, one of the
nucleotides shown in bold would be the first transcribed in this small molecule.
5'—ATGATCGGATCGATCCAT—3'
3'—TACTAGCCTAGCTAGGTA—5'
Which sequence is the correct mRNA produced from the transcription of this DNA
molecule? Ans✓✓✓ 5'-AUGAUCGGAUCGAUCCAU-3'
A fatty acid contains primarily carbon and hydrogen atoms, and its hydrocarbon
tail is very hydrophobic. What kind of interaction can occur between hydrocarbon
tails of fatty acids? Ans✓✓✓ van der waals
A phosphodiester bond in nucleic acid polymers is formed between: Ans✓✓✓ a
hydroxyl on the sugar component of one nucleotide and the phosphate group of
another nucleotide.
, A template DNA strand contains the sequence 3'-ATGCTGAC-5'. The
corresponding sequence in the RNA transcript is: Ans✓✓✓ 5'-UACGACUG-3'.
Adjacent nucleotides in an RNA chain are held together by: Ans✓✓✓
phosphodiester bonds
After translation has been initiated, how long will elongation continue? Ans✓✓✓
until the ribosome reaches a UAA, UAG, or UGA codon
All of the chemical reactions in a cell that are required to sustain life are referred
to as Ans✓✓✓ metabolism.
All of these groups are a component of an amino acid except: Ans✓✓✓ ?
An organism's genome is analyzed and found to contain 18% guanine. What
percentage of that organism's DNA is adenine? Ans✓✓✓ 32%
An RNA transcript is synthesized in which direction? Ans✓✓✓ 5' to 3'
An unsaturated fatty acid contains: Ans✓✓✓ one or more double bonds between
carbon atoms.
As part of their normal function, many proteins bind to DNA briefly and then
release it again. Which types of interactions might be involved in these transient
protein-DNA interactions? Ans✓✓✓ van der waals, ionic, and hydrogen bonding
