Exam 2 Questions MCB3020 Bacusmo
UPDATED ACTUAL Questions and
CORRECT Answers
Griffith's experiment demonstrated transformation because a mouse injected with live R and
heat-killed S strains of Streptococcus pneumoniae resulted in death of the mouse and the
isolation of live R as well as live S cells. Hypothesize as to the type of cells that Griffith would
have observed if transformation had not occurred. - CORRECT ANSWER - Griffith
would have isolated only live R cells from the mouse host.
Which of the following is a region of DNA at the end of a linear chromosome? - CORRECT
ANSWER - Telomere
What best describes transcription? - CORRECT ANSWER - DNA -> RNA
What best describes translation? - CORRECT ANSWER - RNA -> Protein
Nucleotides are the building blocks of ______. - CORRECT ANSWER - both DNA and
RNA
A structural gene encodes the information for a specific protein. - CORRECT ANSWER -
True
The amino acid sequence of a protein determines its shape and specific function. - CORRECT
ANSWER - True
The process by which the base sequence of all or a portion of a DNA molecule is used to direct
the synthesis of an RNA molecule is called - CORRECT ANSWER - transcription.
________ molecules deliver amino acids to ribosomes during translation. - CORRECT
ANSWER - Transfer RNA (tRNA)
, The process by which the base sequence of an RNA molecule is used to direct the synthesis of a
protein is called - CORRECT ANSWER - Translation
VIDEO: The Rho protein is involved in the _____ stage of transcription. - CORRECT
ANSWER - Termination
VIDEO: What statement is correct regarding sigma factor? - CORRECT ANSWER -
Recognizes the promoter region
VIDEO: Which of the following occurs first in transcription? - CORRECT ANSWER -
Formation of a holoenzyme
VIDEO: The RNA transcript being produced by the RNA polymerase is complementary to the
template strand of the DNA. - CORRECT ANSWER - True
VIDEO: Unwinding of the DNA during transcription is the result of the activity of a helicase
enzyme downstream of the RNA polymerase. - CORRECT ANSWER - False
Which of the following is not a complementary base pair found in DNA molecules? -
CORRECT ANSWER - Adenine-Uracil
VIDEO: The lac operon is expressed when glucose is - CORRECT ANSWER - low and
lactose is present
VIDEO: When in a complex with ________, the CAP protein binds to the CAP site and
________ the expression of the lac operon. - CORRECT ANSWER - cAMP; switches on
VIDEO: In the absence of lactose, the lac repressor is - CORRECT ANSWER - active and
can bind to the operator.
UPDATED ACTUAL Questions and
CORRECT Answers
Griffith's experiment demonstrated transformation because a mouse injected with live R and
heat-killed S strains of Streptococcus pneumoniae resulted in death of the mouse and the
isolation of live R as well as live S cells. Hypothesize as to the type of cells that Griffith would
have observed if transformation had not occurred. - CORRECT ANSWER - Griffith
would have isolated only live R cells from the mouse host.
Which of the following is a region of DNA at the end of a linear chromosome? - CORRECT
ANSWER - Telomere
What best describes transcription? - CORRECT ANSWER - DNA -> RNA
What best describes translation? - CORRECT ANSWER - RNA -> Protein
Nucleotides are the building blocks of ______. - CORRECT ANSWER - both DNA and
RNA
A structural gene encodes the information for a specific protein. - CORRECT ANSWER -
True
The amino acid sequence of a protein determines its shape and specific function. - CORRECT
ANSWER - True
The process by which the base sequence of all or a portion of a DNA molecule is used to direct
the synthesis of an RNA molecule is called - CORRECT ANSWER - transcription.
________ molecules deliver amino acids to ribosomes during translation. - CORRECT
ANSWER - Transfer RNA (tRNA)
, The process by which the base sequence of an RNA molecule is used to direct the synthesis of a
protein is called - CORRECT ANSWER - Translation
VIDEO: The Rho protein is involved in the _____ stage of transcription. - CORRECT
ANSWER - Termination
VIDEO: What statement is correct regarding sigma factor? - CORRECT ANSWER -
Recognizes the promoter region
VIDEO: Which of the following occurs first in transcription? - CORRECT ANSWER -
Formation of a holoenzyme
VIDEO: The RNA transcript being produced by the RNA polymerase is complementary to the
template strand of the DNA. - CORRECT ANSWER - True
VIDEO: Unwinding of the DNA during transcription is the result of the activity of a helicase
enzyme downstream of the RNA polymerase. - CORRECT ANSWER - False
Which of the following is not a complementary base pair found in DNA molecules? -
CORRECT ANSWER - Adenine-Uracil
VIDEO: The lac operon is expressed when glucose is - CORRECT ANSWER - low and
lactose is present
VIDEO: When in a complex with ________, the CAP protein binds to the CAP site and
________ the expression of the lac operon. - CORRECT ANSWER - cAMP; switches on
VIDEO: In the absence of lactose, the lac repressor is - CORRECT ANSWER - active and
can bind to the operator.
