Question

Scientists develop a genetically modified plant species that has a nonfunctional protein. The protein is necessary for the plant to use nitrogen. The species has a single mutation in a gene.

What does this tell us about the relationship between DNA and proteins?

(1 point)
Responses

Nitrogen is vital for plant species survival.
Nitrogen is vital for plant species survival.

Proteins are not related to DNA.
Proteins are not related to DNA.

Mutations in DNA are always harmful to organisms.
Mutations in DNA are always harmful to organisms.

Changes in DNA can affect protein function.
Changes in DNA can affect protein function.

The mutation shown in the sequence can be categorized as which type?

Original DNA Sequence
A T A C G G T A G C A A
T A T G C C A T C G T T
Mutated DNA Sequence
A T A C G G T A G A A
T A T G C C A T C T T
(1 point)
Responses

chromosomal mutation
chromosomal mutation

deletion mutation
deletion mutation

insertion mutation
insertion mutation

substitution mutation
substitution mutation
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Question
A student is studying the following model of DNA.

A strand of DNA that has exons and introns. The exons are labeled as coding regions. The introns are labeled as non-coding regions.

The student learns that some of the non-coding regions have a high concentration of repressors bound to them.

Which question should the student ask to further understand the role of these non-coding regions in gene regulation?

(1 point)
Responses

What are the sequences of these non-coding regions, and how do they compare to known repressors?
What are the sequences of these non-coding regions, and how do they compare to known repressors?

How are these non-coding regions transcribed into mRNA
How are these non-coding regions transcribed into mRNA

How do these non-coding regions interact with DNA polymerase during replication?
How do these non-coding regions interact with DNA polymerase during replication?

Do these non-coding regions affect the structure of the DNA double helix?
Do these non-coding regions affect the structure of the DNA double helix?
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A tall, heterozygous pea plant is cross-pollinated with another tall, heterozygous pea plant. Use a Punnett square to determine the probability that the offspring is a tall, homozygous pea plant.(1 point)
Responses

0%
0%

75%
75%

25%
25%

50%
50%

In a study on human height, researchers found that identical twins raised in different countries often have different heights as adults. What does this suggest about the traits, such as height, in humans?(1 point)
Responses

Height is determined solely by environmental factors.
Height is determined solely by environmental factors.

The differences in height are random and not influenced by environmental and genetic factors.
The differences in height are random and not influenced by environmental and genetic factors.

Both environmental factors and genetic factors influence height.
Both environmental factors and genetic factors influence height.

Height is determined solely by genetic factors.
Height is determined solely by genetic factors.


SARS is a respiratory illness caused by SARS-CoV-1, a coronavirus. It belongs to the same family of viruses that cause common colds.

Streptococcus pneumoniae is a bacterium that causes pneumonia. Pneumonia is an illness that causes fluid buildup in the lungs.

Which of the following statements correctly identifies the characteristics of SARS-CoV-1 and Streptococcus pneumoniae?

(1 point)
Responses

Neither can replicate independently.
Neither can replicate independently.

SARS-CoV-1 can replicate independently, but Streptococcus pneumoniae requires a host cell to replicate.
SARS-CoV-1 can replicate independently, but Streptococcus pneumoniae requires a host cell to replicate.

Both can replicate independently.
Both can replicate independently.

Streptococcus pneumoniae can replicate independently, but SARS-CoV-1 requires a host cell to replicate.

Which is true about the lytic and lysogenic cycles of viruses?(1 point)
Responses

The viral genome incorporates into the host genome during the lysogenic cycle.
The viral genome incorporates into the host genome during the lysogenic cycle.

The lysogenic cycle involves newly replicated virus bursting from the cell.
The lysogenic cycle involves newly replicated virus bursting from the cell.

The lytic cycle involves the merging together of the viral and host genomes.
The lytic cycle involves the merging together of the viral and host genomes.

The viral genome is injected into the cell only during the lytic cycle.

Answer 1

1) Changes in DNA can affect protein function.

2) substitution mutation

3) What are the sequences of these non-coding regions, and how do they compare to known repressors?

4) 25%

5) Both environmental factors and genetic factors influence height.

6) Streptococcus pneumoniae can replicate independently, but SARS-CoV-1 requires a host cell to replicate.

7) The viral genome incorporates into the host genome during the lysogenic cycle.