Unit 1 Progress Check MCQ Questions with Verified Answers Rated A
1. Which feature of model 1 best illustrates D. The linear sequence of the base pairs
how biological information is coded in a
DNA molecule? The sequence of base pairs in a DNADNA mol-
ecule plays a central role in the coding of bio-
logical information.
2. Figure 1 represents a segment of DNA. C. Bonds YY and ZZ at the same time
Radiation can damage the nucleotides in
a DNA molecule. To repair some types By breaking bonds Y and Z at the same time,
of damage, a single nucleotide can be the cytosine nucleotide could be removed from
removed from a DNA molecule and re- the DNA molecule and replaced with an un-
placed with an undamaged nucleotide. damaged cytosine without changing the bio-
Which of the four labeled bonds in Figure logical information stored in the DNA.
1 could be broken to remove and replace
the cytosine nucleotide without affecting
the biological information coded in the
DNA molecule?
3. A student wants to modify model 1 so B. Changing the deoxyriboses to riboses by
that it represents an RNA double helix adding −OH groups
instead of a DNA double helix. Of the
following possible changes, which would RNA contains ribose, whereas DNA contains
be most effective in making model 1 look deoxyribose. A ribose sugar has an −OH group
more like RNA than DNA? linked to the 2′ carbon that a deoxyribose sugar
does not have.
4. Different polysaccharides are used by B. Starch and cellulose are composed of re-
plants for energy storage and structur- peating glucose monomers; however, in cellu-
1/8
, Unit 1 Progress Check MCQ Questions with Verified Answers Rated A
al support. The molecular structures for lose every other glucose monomer is rotated
two common polysaccharides are shown 180 degrees.
in Figure 1. Starch is used by plants
for energy storage, and cellulose pro- Both starch and cellulose are both composed
vides structural support for cell walls. The of repeating glucose molecules; however, the
monomer used to construct both mole- orientation of every other glucose in cellulose
cules is glucose. is upside down compared with the ones on
A study determined the effect of two dif- either side.
ferent digestive enzymes, A and B, on
these two polysaccharides. Table 1 pre-
sents the data from the study.
Mammals do not produce digestive en-
zyme B. However, sheep and cattle are
two types of mammals that contain mi-
croorganisms in their digestive tract that
produce enzyme B.
Based on Figure 1, which of the following
best compares the atomic structures of
starch and cellulose?
5. Different polysaccharides are used by A. The ditterences in the assembly and organi-
plants for energy storage and structur- zation of the monomers of these two polymers
al support. The molecular structures for result in ditterent chemical properties.
two common polysaccharides are shown
in Figure 1. Starch is used by plants The identical orientations of the glucose
for energy storage, and cellulose pro- monomers in starch create a polysaccharide
vides structural support for cell walls. The with alpha bonds that is easy to break down
monomer used to construct both mole- into glucose for energy use. The alternating
cules is glucose. orientations of the glucose monomers in cel-
A study determined the effect of two dif- lulose create beta bonds that produce a rigid
ferent digestive enzymes, A and B, on polymer that is diflcult to digest for energy
these two polysaccharides. Table 1 pre- use.
2/8
1. Which feature of model 1 best illustrates D. The linear sequence of the base pairs
how biological information is coded in a
DNA molecule? The sequence of base pairs in a DNADNA mol-
ecule plays a central role in the coding of bio-
logical information.
2. Figure 1 represents a segment of DNA. C. Bonds YY and ZZ at the same time
Radiation can damage the nucleotides in
a DNA molecule. To repair some types By breaking bonds Y and Z at the same time,
of damage, a single nucleotide can be the cytosine nucleotide could be removed from
removed from a DNA molecule and re- the DNA molecule and replaced with an un-
placed with an undamaged nucleotide. damaged cytosine without changing the bio-
Which of the four labeled bonds in Figure logical information stored in the DNA.
1 could be broken to remove and replace
the cytosine nucleotide without affecting
the biological information coded in the
DNA molecule?
3. A student wants to modify model 1 so B. Changing the deoxyriboses to riboses by
that it represents an RNA double helix adding −OH groups
instead of a DNA double helix. Of the
following possible changes, which would RNA contains ribose, whereas DNA contains
be most effective in making model 1 look deoxyribose. A ribose sugar has an −OH group
more like RNA than DNA? linked to the 2′ carbon that a deoxyribose sugar
does not have.
4. Different polysaccharides are used by B. Starch and cellulose are composed of re-
plants for energy storage and structur- peating glucose monomers; however, in cellu-
1/8
, Unit 1 Progress Check MCQ Questions with Verified Answers Rated A
al support. The molecular structures for lose every other glucose monomer is rotated
two common polysaccharides are shown 180 degrees.
in Figure 1. Starch is used by plants
for energy storage, and cellulose pro- Both starch and cellulose are both composed
vides structural support for cell walls. The of repeating glucose molecules; however, the
monomer used to construct both mole- orientation of every other glucose in cellulose
cules is glucose. is upside down compared with the ones on
A study determined the effect of two dif- either side.
ferent digestive enzymes, A and B, on
these two polysaccharides. Table 1 pre-
sents the data from the study.
Mammals do not produce digestive en-
zyme B. However, sheep and cattle are
two types of mammals that contain mi-
croorganisms in their digestive tract that
produce enzyme B.
Based on Figure 1, which of the following
best compares the atomic structures of
starch and cellulose?
5. Different polysaccharides are used by A. The ditterences in the assembly and organi-
plants for energy storage and structur- zation of the monomers of these two polymers
al support. The molecular structures for result in ditterent chemical properties.
two common polysaccharides are shown
in Figure 1. Starch is used by plants The identical orientations of the glucose
for energy storage, and cellulose pro- monomers in starch create a polysaccharide
vides structural support for cell walls. The with alpha bonds that is easy to break down
monomer used to construct both mole- into glucose for energy use. The alternating
cules is glucose. orientations of the glucose monomers in cel-
A study determined the effect of two dif- lulose create beta bonds that produce a rigid
ferent digestive enzymes, A and B, on polymer that is diflcult to digest for energy
these two polysaccharides. Table 1 pre- use.
2/8
