1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
White raven [17]
3 years ago
8

A scientist studying the effects of radiation on DNA performs an experiment in which she exposes a sequence of nitrogen bases fo

und in DNA to radiation. The DNA before and after the radiation is shown below.
Use the evidence to determine whether a mutation has occurred, and if so, interpret that mutation in the answer sheet provided

Before Exposure: ATCGTCA; After Exposure: ATTCGTCA

A. No mutation has occurred to the DNA sequence.

B. A nitrogen base has been deleted from the DNA molecule.

C. A nitrogen base has replaced another nitrogen base in the DNA molecule.

D. A nitrogen base has been added to the DNA molecule.
Biology
1 answer:
Oksana_A [137]3 years ago
6 0

Answer:

D. A nitrogen base has been added to the DNA molecule.  

Explanation:

You can see that the sequence for the nitrogen bases are in the exact same order after the exposure, this rules out A.  You can count how many bases there are, 7 before and 8 after so it cannot be B. Lastly, given that they are in the same order as were before and that a base has been added, you can see that no bases were replaced (so not C) and that D is your answer.  

You might be interested in
What is the volume of air that my lungs hold
UkoKoshka [18]

Answer:

Tidal volume

Explanation:

Tidal volume is the amount of air taken into the lungs in a single breath. However, the lungs can hold a total of about 4-6 liters, which is close to ten times the tidal volume. This amount is known as the vital capacity.

7 0
3 years ago
What does it mean if a plant responds to touch
iris [78.8K]

thigmotropism is what it is called

4 0
3 years ago
Read 2 more answers
What happens when an electrical gradient and a chemical gradient are applying opposite forces to active transport?
Ierofanga [76]

Answer:

Option B, they negate each other

Explanation:

Electrical gradient force is more or less equal to the chemical gradient during an active transport. The number of electron produced during the establishment of chemical gradients, were transferred through the cellular circuit to produce electrical gradient of an equivalent amount in opposite path.

Thus, both electrical and chemical gradient are opposite to each other and hence they negate out each other.

Option B

8 0
3 years ago
How does the presence of starch show that photosynthesis has taken place
Irina18 [472]
Glucose is a product of photosynthesis. Glucose is also a type of starch.
7 0
3 years ago
What are the 4 characteristics that separate mammals from other vertebrates?
Komok [63]

Answer:

1, 2, 3, 5

Explanation:

6 0
3 years ago
Other questions:
  • Under conditions of darkness, a euglena acts more like a(n) _______. A. animal B. plant C. human D. fungus
    12·2 answers
  • What structure is required for an eukaryotic organism to be classified as an autotroph?
    15·1 answer
  • Discuss how to recognize the predator and the prey in a predation relationship
    7·1 answer
  • An unnatural warming of the atmosphere near earth's surface is called
    7·1 answer
  • The _______ circulation brings carbon dioxide-filled blood to the lungs.
    7·2 answers
  • 1 pts
    15·1 answer
  • Viruses are ______ that can only survive and reproduce by infecting living cells.
    5·1 answer
  • In a healthy body, what are the three molecules the body systems deliver to the cells?
    11·1 answer
  • What happens during metaphase 2 in meiosis?
    5·2 answers
  • Are invasive species and exotic species the same? Explain your answer ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!