BIO 1500 Final tests
1. A gene has mutated and you want to know whether it involved a point muta-
tion or the insertion of a single DNA base. Which of the following observations
would provide the strongest evidence that it was an insertion rather than a
point mutation?: Multiple codons have changed as a result of the mutation.:A point mutation involves the
substitution of one base with another, affecting a single codon and subsequently altering just one amino acid in a
protein. In contrast, if a base is deleted, the reading frame of codons is shifted, causing errors in nearly every codon
downstream and resulting in a dysfunctional protein due to incorrect amino acid sequences. Overall, these genetic
changes can significantly impact the functionality of the protein produced.
2. Molecules are added to water and then the molecules move through the
water via diffusion. A concentration gradient no longer exists when: the density of
the added molecules is the same throughout the water
3. Simple diffusion is very efficient for moving molecules around inside cells,
but it is inefficient for moving molecules from one part of the body, such as the
,brain, to another part of the body, such as the heart. Why?: Since the time for diffusion
increases with the square of the distance the molecules need to move, diffusion is too slow to move molecules around
the body.
4. Look at this image from your Online Learning video, showing blue and orange
particles. In the next moment in time, how are the two labeled particles most
likely to move? (If the image isn't visible on your screen, look at the figure
labeled 'diffusion' on the slide.): movements in all directions are equally likely
5. Diffusion is often defined as 'the movement of molecules from an area of
high concentration to an area of low concentration.' Which of the following
statements best explains the reason for this pattern of movement?: The molecules
move randomly, resulting in more of them moving away from a high-density area than moving away from a low-density
area.
6. Suppose you earn an 80% on your lab worksheets, quizzes, and participation
,scores. However, you frequently skip Discussion and end up with a Discussion
average of 50%. What will be your combined Lab and Discussion score?: 40%
7. Which of the following statements best describes the conditions on much of
Earth during the Carboniferous Period?: swampy forests
, 8. You want to know the effect of air temperature on the time it takes for Jello
penny on
to set. You run an experiment in which you put bowls of freshly dissolved Jello
appropriate
into chambers that maintain different air temperatures, and you measure how
long it takes for the Jello to set hard enough that you can place a
top without it falling through. Which of the graphs below is most
for representing your data? Note: the two options might be in reverse order in
your choices, so be sure to read the number. (If the image isn't visible on your
screen, look at the figure labeled 'graphs' on the slide.): Option 1
9. The early atmosphere on Earth contained only trace amounts of O2, which
now makes up about 20% of the air we breathe. Where did the O2 in the
atmosphere come from?: it was released by photosynthetic organisms
1. A gene has mutated and you want to know whether it involved a point muta-
tion or the insertion of a single DNA base. Which of the following observations
would provide the strongest evidence that it was an insertion rather than a
point mutation?: Multiple codons have changed as a result of the mutation.:A point mutation involves the
substitution of one base with another, affecting a single codon and subsequently altering just one amino acid in a
protein. In contrast, if a base is deleted, the reading frame of codons is shifted, causing errors in nearly every codon
downstream and resulting in a dysfunctional protein due to incorrect amino acid sequences. Overall, these genetic
changes can significantly impact the functionality of the protein produced.
2. Molecules are added to water and then the molecules move through the
water via diffusion. A concentration gradient no longer exists when: the density of
the added molecules is the same throughout the water
3. Simple diffusion is very efficient for moving molecules around inside cells,
but it is inefficient for moving molecules from one part of the body, such as the
,brain, to another part of the body, such as the heart. Why?: Since the time for diffusion
increases with the square of the distance the molecules need to move, diffusion is too slow to move molecules around
the body.
4. Look at this image from your Online Learning video, showing blue and orange
particles. In the next moment in time, how are the two labeled particles most
likely to move? (If the image isn't visible on your screen, look at the figure
labeled 'diffusion' on the slide.): movements in all directions are equally likely
5. Diffusion is often defined as 'the movement of molecules from an area of
high concentration to an area of low concentration.' Which of the following
statements best explains the reason for this pattern of movement?: The molecules
move randomly, resulting in more of them moving away from a high-density area than moving away from a low-density
area.
6. Suppose you earn an 80% on your lab worksheets, quizzes, and participation
,scores. However, you frequently skip Discussion and end up with a Discussion
average of 50%. What will be your combined Lab and Discussion score?: 40%
7. Which of the following statements best describes the conditions on much of
Earth during the Carboniferous Period?: swampy forests
, 8. You want to know the effect of air temperature on the time it takes for Jello
penny on
to set. You run an experiment in which you put bowls of freshly dissolved Jello
appropriate
into chambers that maintain different air temperatures, and you measure how
long it takes for the Jello to set hard enough that you can place a
top without it falling through. Which of the graphs below is most
for representing your data? Note: the two options might be in reverse order in
your choices, so be sure to read the number. (If the image isn't visible on your
screen, look at the figure labeled 'graphs' on the slide.): Option 1
9. The early atmosphere on Earth contained only trace amounts of O2, which
now makes up about 20% of the air we breathe. Where did the O2 in the
atmosphere come from?: it was released by photosynthetic organisms
