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
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by A. a change in the
Tomtit [17]

A change in the morphology of the leaves generated can frequently be used to detect when an apical meristem transition from the juvenile to the mature vegetative phase.

<h3><u>Apical meristem: What is it?</u></h3>

The growth zone within the tips of new shoots and leaves as well as the root tips of plants is known as the apical meristem. One of three meristem types, or tissues that can differentiate into distinct cell types, is the apical meristem. Plant growth takes place in the meristem tissue.

Apical growth is defined as taking place at the top and bottom of the plant. While lateral meristems are found between branches, intercalary meristems grow in girth like those of woody plants. The apical meristem is essential for expanding both the roots' and leaves' access to light energy and nutrients. For plants to succeed, they need to grow in both of these directions.

Learn more about apical meristem with the help of the given link:

brainly.com/question/798517

#SPJ4

4 0
1 year ago
In the tundra, what is the difference between the biotic and abiotic factors you saw in the image?
Sphinxa [80]

Answer:

Abiotic factors refer to non-living physical and chemical elements in the ecosystem. ... Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction.

Explanation:

7 0
2 years ago
The skin covering the human body consists of _____ layers. 6 4 3 2
sertanlavr [38]

the skin covering the human body consists of 2 layers.

4 0
2 years ago
Read 2 more answers
What is an aquifer??
Masja [62]
A body of permeable rock which can contain or transmit groundwater.
7 0
3 years ago
PLSSS HELP I WILL MARK BRAINLIEST I TRULY NEED HELP IM GONNA FAIL
Angelina_Jolie [31]

Answer: C

Explanation:

6 0
2 years ago
Other questions:
  • In what way do adaptations help the survival of a species?
    9·2 answers
  • Which organism is responsible for cleanup in this ecosystem?
    8·1 answer
  • Which kind of molecules can pass unaided through the cell membrane?
    11·1 answer
  • Does anyone kowns the answer to theses questions? any help will do
    15·1 answer
  • Genetic diversity helps a species survive. What is genetic diversity?
    9·2 answers
  • Which two statements describe the advantages of genetic engineering
    9·1 answer
  • Which number is the base?--3^6
    10·1 answer
  • A pregnant woman has come to the emergency department with complaints of nasal congestion and epistaxis. What is the correct int
    6·1 answer
  • Excluding plasma, which state of matter has the most kinetic energy?
    8·1 answer
  • Scientific knowledge is always changing. At one time, the kingdom was the
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!