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
Will give brainliest<br> What is this?
kirza4 [7]

Answer:

cells

Explanation:

it should be

8 0
3 years ago
Read 2 more answers
The electromagnetic waves with the shortest wavelengths and the highest frequencies are called
horrorfan [7]
Visible light<span>, U</span>ltraviolet<span> Rays, X-rays, and </span>gamma rays<span>. The electromagnetic spectrum shows the range of different electromagnetic waves in order of increasing frequency and decreasing wavelength. Radio waves are the electromagnetic waves with the longest wavelengths and lowest frequencies.</span>
7 0
3 years ago
Read 2 more answers
Where the ocean would you expect to find the largest % of dissolved gases ?
Tom [10]

Seawater has many different gases dissolved in it, especially nitrogen, oxygen and carbon dioxide. It exchanges these gases with the atmosphere to keep a balance between the ocean and the atmosphere. This exchange is helped by the mixing of the surface by wind and waves.

4 0
3 years ago
Do you need to know if this organism grows anaerobically? if so, why? how would you determine if this organism grows anaerobical
snow_lady [41]
It is important to determine or know whether an organism is aerobic or anaerobic because from there you would be able to know the perfect conditions for the organism to grow and reproduce. If you are culturing the organism you would need if it needs oxygen and how much of oxygen is needed. Anaerobic organisms does not need the presence of oxygen in order to grow. You can determine an organism that is anaerobic by trying to put them in conditions that dos not have oxygen. After a few hours or days, when you observe that more organisms are present, then most likely it is an anaerobic organism.<span />
7 0
3 years ago
g What will be the effect of the overexpression of this truncated receptor? EGFR will dimerize but will not cross‑phosphorylate,
Alexandra [31]

Answer:

<h2>EGFR will activate other proteins without dimerization, causing uncontrolled cell growth.</h2>

Explanation:

EGFR gene :

Epidermal growth factor receptor,

-which spans the cell membrane so that one end of the protein remains inside the cell and the other end located outer surface of the cell. This causes receptor to attach ligands, and to receive signals ,by which cell respond to its environment. Epidermal growth factor receptor binds to many different type of receptors. The binding of a ligand to receptor allows the receptor to attach to another nearby epidermal growth factor receptor protein (dimerize), activating the receptor complex. As a result, signaling pathways within the cell are triggered that promote cell growth and division and cell survival. If there is abnormlty in the expression of EGFR gene  , then the cell show uncontrolled growth.

8 0
4 years ago
Other questions:
  • In pea plants, purple flowers (“P”) are dominant to white followers (“p”). A white-flowered plant is crossed with a plant that i
    12·1 answer
  • When a sperm cell and an egg emerge, they undergo the process of fertilization and give rise to a?
    8·1 answer
  • The A159E mutation causes an A amino acid to be replaced with an E amino acid (their structures are shown here). What effects do
    10·1 answer
  • Some animals (e.g., whiptail lizards) and plants (e.g., strawberries) form clones of genetically identical, but physiologically
    12·1 answer
  • What happened at the end of the Mesozoic era, but did not happen at the end
    5·1 answer
  • How does binomial nomenclature help scientists?<br><br>help!!!​
    8·1 answer
  • This is ___ because there are two ___ traits.
    7·2 answers
  • 55.7 moles of PCl5 will decompose to produce how many moles of PCl3 and Cl2 combined ?Enter your answer correct to 1 decimal pla
    13·1 answer
  • 4. Which of the following is not a typical function of a cell membrane?
    7·1 answer
  • List the pathway of an erythrocyte (red blood cell) from the right atrium to the aortic semilunar valve.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!