QBM EXAM 1 questions with verified
answers
Which of the following refers to manipulating a piece of DNA and putting it into a
plasmid for the purposes of gene studies, protein expression, and gene therapy?
Ans✓✓-Recombinant DNA technology
What type of bond is found in a protein that connects individual amino acids?
Ans✓✓-peptide
Employers must inform employees and train them in the safe handling of
potentially harmful chemicals. This is required by Ans✓✓-OSHA
Research labs that handle pathogenic organisms for which there is no vaccine that
can cause diseases which are generally untreatable and fatal are assigned a rating
of Ans✓✓-BSL-4
Which type of gloves offer the least amount of protection from
chemical/biological hazards? Ans✓✓-Plastic
Absorbance and transmittance are Ans✓✓-logarithmically proportional
Absorbance and concentration are Ans✓✓-directly proportional
Colorimetry is used to make samples detectable in the _____ spectrum. Ans✓✓-
visible
, A type of centrifugation used in the lab to rapidly collect samples in 1.5 ml tubes
is Ans✓✓-small bench top centrifugation
With regards to potential destructive ability, which type of centrifuge is most
dangerous and must be balanced within 0.1g? Ans✓✓-Ultracentrifuge
When using a centrifuge to spin down a sample the pellet is considered the ___
fraction and the supernatant is considered the ____ fraction. Ans✓✓-insoluble;
soluble
If Meselson and Stahl had observed the following pattern they would have
concluded that DNA replication was Ans✓✓-conservative
You have a 1.5 ml tube of frozen enzyme. Upon removing it from the freezer you
should thaw it and spin it down briefly in a centrifuge. What is the purpose of
this? Ans✓✓-To remove any liquid from inside the cap
Which of the following is considered proper technique when handling a
micropipette? Ans✓✓-Holding the micropipette consistently vertical
Spectroscopy refers to the separation of light into its wavelengths. Ans✓✓-True
When using a pipette, the greatest accuracy is achieved by Ans✓✓-holding the
pipette perfectly vertical
Why are polypropylene bottles generally preferred in a research lab? Ans✓✓-
They are more resistant to harsh chemicals
answers
Which of the following refers to manipulating a piece of DNA and putting it into a
plasmid for the purposes of gene studies, protein expression, and gene therapy?
Ans✓✓-Recombinant DNA technology
What type of bond is found in a protein that connects individual amino acids?
Ans✓✓-peptide
Employers must inform employees and train them in the safe handling of
potentially harmful chemicals. This is required by Ans✓✓-OSHA
Research labs that handle pathogenic organisms for which there is no vaccine that
can cause diseases which are generally untreatable and fatal are assigned a rating
of Ans✓✓-BSL-4
Which type of gloves offer the least amount of protection from
chemical/biological hazards? Ans✓✓-Plastic
Absorbance and transmittance are Ans✓✓-logarithmically proportional
Absorbance and concentration are Ans✓✓-directly proportional
Colorimetry is used to make samples detectable in the _____ spectrum. Ans✓✓-
visible
, A type of centrifugation used in the lab to rapidly collect samples in 1.5 ml tubes
is Ans✓✓-small bench top centrifugation
With regards to potential destructive ability, which type of centrifuge is most
dangerous and must be balanced within 0.1g? Ans✓✓-Ultracentrifuge
When using a centrifuge to spin down a sample the pellet is considered the ___
fraction and the supernatant is considered the ____ fraction. Ans✓✓-insoluble;
soluble
If Meselson and Stahl had observed the following pattern they would have
concluded that DNA replication was Ans✓✓-conservative
You have a 1.5 ml tube of frozen enzyme. Upon removing it from the freezer you
should thaw it and spin it down briefly in a centrifuge. What is the purpose of
this? Ans✓✓-To remove any liquid from inside the cap
Which of the following is considered proper technique when handling a
micropipette? Ans✓✓-Holding the micropipette consistently vertical
Spectroscopy refers to the separation of light into its wavelengths. Ans✓✓-True
When using a pipette, the greatest accuracy is achieved by Ans✓✓-holding the
pipette perfectly vertical
Why are polypropylene bottles generally preferred in a research lab? Ans✓✓-
They are more resistant to harsh chemicals
