BIOL102 Midterm Prep Questions with 100% Verified
Correct Answers
(U1) your microbiologist friend isolated two new bacteria and stored them in separate tubes. One
bacterium was isolated from the ice of Antartica and the other from a thermal vent. However, your
friend accidentally wiped the label off of the tubes storing the bacteria and no longer know which
bacterium was isolated from the Antartica and which was isolates from the thermal vent. Why might
you be able to determine which bacterium was isolates fro which location by examining the
membrane lipid composition?
a) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
shorter fatty acids in their membrane.
b) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
more saturated fatty acids in their membrane.
c) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
more unsaturated fatty acids in their me - Correct Answer b) to maintain proper membrane fluidity,
bacteria growing at high temperatures are likely to have more saturated fatty acids in their
membrane.
learning objective 3.3
(U1) Imagine you are an astronaut and you are the first person to walk on Mars. You make the
surprising discovery that there are "bacteria-like organisms" on Mars. Which of the following must be
true for you to consider these "bacteria-like organisms" as living?
a)they must be able to evolve
b)they must be able to communicate
c)they must be able to move
d)they must contain unsaturated fatty acids in their membrane - Correct Answer a)they must be able
to evolve
learning objective 1.2
(U1) Imagine you are a microbiologist and you isolate a new bacterium from a landfill. You have the
following question: can this bacterium eat plastic? Which of the following options is an appropriate
hypothesis? Chose the best answer
,a)the bacterium can eat plastic
b)there are all equally appropriate hypotheses
c)if given plastic, the bacterium will not eat it
d)if given plastic, the bacterium will eat it - Correct Answer a)the bacterium can eat plastic
learning objective 1.1
(U1) Plankton are microscopic organisms that live in water, and their survival is impacted by the
concentration of salt in the water. Many Canadian municipalities apply salt to roads and sidewalks in
the winter to melt the ice, making it safer to drive. However, much of this salt ends of in local water
bodies such as lakes and rivers. Which of the following is likely to occur?
a)Over time, the population of plankton will become more sensitive to salt
b)the concentration of salt in the water will decrease over time
c)plankton with random DNA mutations that increase salt tolerance will be selected
d)the plankton population will not be impacted - Correct Answer c)plankton with random DNA
mutations that increase salt tolerance will be selected
learning objective 1.3
(U1) Imagine you are studying a protein with the primary sequence of: proline - tryptophan - leucine
- glutamine - glutamic acid. Based on the structure of the 20 amino acids provided below,
substitution of leucine with which amino acid listed below is least likely to change the function of the
protein? (image Q10)
a)histidine
b)methionine
c)phenylalanine
d)asparagine - Correct Answer b)methionine
learning objective 3.3
(U1) The provided image shows two organic molecules. What is the classification of these molecules
and how are they related? (image Q6-D)
, a)they are monosaccharides and they are structural isomers
b)they are monosaccharides and they are enantiomers
c)they are hydrocarbons and they are enantiomers
d)they are hydrocarbons and they are structural isomers - Correct Answer a)they are
monosaccharides and they are structural isomers
learning objective 2.3&3.1
(U1) What is the impact of a large body of water on the temperature of nearby cities in the summer?
a)The water body will absorb lots of heat due to its lack of hydrogen bonding, decreasing the
temperature of nearby cities
b)The water body will absorb lots of heat due to its extensive hydrogen bonding, increasing the
temperature of nearby cities
c)The water body will absorb lots of heat due to its extensive hydrogen bonding, decreasing the
temperature of nearby cities
d)The water body will absorb little heat due to its lack of hydrogen bonding, decreasing the
temperature of nearby cities - Correct Answer c)The water body will absorb lots of heat due to its
extensive hydrogen bonding, decreasing the temperature of nearby cities
learning objective 2.2
(U1) Cells contain two types of nucleic acids: DNA and RNA. Which of the following statements about
DNA and RNA is the most accurate?
a)The sugar component of DNA nucleotides contains one more oxygen molecule than is found in the
sugar component of RNA nucleotides
b)DNA contains thymine whereas RNA contains uracil
c)Hydrogen bonding can occur between bases in DNA molecules, whereas this does not occur in RNA
molecules
d)all three of the other options are correct - Correct Answer b)DNA contains thymine whereas RNA
contains uracil
Correct Answers
(U1) your microbiologist friend isolated two new bacteria and stored them in separate tubes. One
bacterium was isolated from the ice of Antartica and the other from a thermal vent. However, your
friend accidentally wiped the label off of the tubes storing the bacteria and no longer know which
bacterium was isolated from the Antartica and which was isolates from the thermal vent. Why might
you be able to determine which bacterium was isolates fro which location by examining the
membrane lipid composition?
a) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
shorter fatty acids in their membrane.
b) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
more saturated fatty acids in their membrane.
c) to maintain proper membrane fluidity, bacteria growing at high temperatures are likely to have
more unsaturated fatty acids in their me - Correct Answer b) to maintain proper membrane fluidity,
bacteria growing at high temperatures are likely to have more saturated fatty acids in their
membrane.
learning objective 3.3
(U1) Imagine you are an astronaut and you are the first person to walk on Mars. You make the
surprising discovery that there are "bacteria-like organisms" on Mars. Which of the following must be
true for you to consider these "bacteria-like organisms" as living?
a)they must be able to evolve
b)they must be able to communicate
c)they must be able to move
d)they must contain unsaturated fatty acids in their membrane - Correct Answer a)they must be able
to evolve
learning objective 1.2
(U1) Imagine you are a microbiologist and you isolate a new bacterium from a landfill. You have the
following question: can this bacterium eat plastic? Which of the following options is an appropriate
hypothesis? Chose the best answer
,a)the bacterium can eat plastic
b)there are all equally appropriate hypotheses
c)if given plastic, the bacterium will not eat it
d)if given plastic, the bacterium will eat it - Correct Answer a)the bacterium can eat plastic
learning objective 1.1
(U1) Plankton are microscopic organisms that live in water, and their survival is impacted by the
concentration of salt in the water. Many Canadian municipalities apply salt to roads and sidewalks in
the winter to melt the ice, making it safer to drive. However, much of this salt ends of in local water
bodies such as lakes and rivers. Which of the following is likely to occur?
a)Over time, the population of plankton will become more sensitive to salt
b)the concentration of salt in the water will decrease over time
c)plankton with random DNA mutations that increase salt tolerance will be selected
d)the plankton population will not be impacted - Correct Answer c)plankton with random DNA
mutations that increase salt tolerance will be selected
learning objective 1.3
(U1) Imagine you are studying a protein with the primary sequence of: proline - tryptophan - leucine
- glutamine - glutamic acid. Based on the structure of the 20 amino acids provided below,
substitution of leucine with which amino acid listed below is least likely to change the function of the
protein? (image Q10)
a)histidine
b)methionine
c)phenylalanine
d)asparagine - Correct Answer b)methionine
learning objective 3.3
(U1) The provided image shows two organic molecules. What is the classification of these molecules
and how are they related? (image Q6-D)
, a)they are monosaccharides and they are structural isomers
b)they are monosaccharides and they are enantiomers
c)they are hydrocarbons and they are enantiomers
d)they are hydrocarbons and they are structural isomers - Correct Answer a)they are
monosaccharides and they are structural isomers
learning objective 2.3&3.1
(U1) What is the impact of a large body of water on the temperature of nearby cities in the summer?
a)The water body will absorb lots of heat due to its lack of hydrogen bonding, decreasing the
temperature of nearby cities
b)The water body will absorb lots of heat due to its extensive hydrogen bonding, increasing the
temperature of nearby cities
c)The water body will absorb lots of heat due to its extensive hydrogen bonding, decreasing the
temperature of nearby cities
d)The water body will absorb little heat due to its lack of hydrogen bonding, decreasing the
temperature of nearby cities - Correct Answer c)The water body will absorb lots of heat due to its
extensive hydrogen bonding, decreasing the temperature of nearby cities
learning objective 2.2
(U1) Cells contain two types of nucleic acids: DNA and RNA. Which of the following statements about
DNA and RNA is the most accurate?
a)The sugar component of DNA nucleotides contains one more oxygen molecule than is found in the
sugar component of RNA nucleotides
b)DNA contains thymine whereas RNA contains uracil
c)Hydrogen bonding can occur between bases in DNA molecules, whereas this does not occur in RNA
molecules
d)all three of the other options are correct - Correct Answer b)DNA contains thymine whereas RNA
contains uracil
