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
A wolf attacks a porcupine and gets stung with quills. The wolf no longer attacks porcupines. What type of behavior does the wol
Anika [276]
I think anger and fear 
7 0
3 years ago
Read 2 more answers
Which is used as evidence for the idea that multicellular organisms evolved from prokaryotes
anzhelika [568]

Living things has emerged into three domains called Archaea, bacteria, and eukaryotes. Evident that support the idea that multi cellular that is eukaryotic cell evolved from the prokaryotic cell are the descendents of the separate prokaryotic cells that together form a union which are inter dependent.

For example: The mitochondria which is referred to the energy source of the cell is considered as the great-great-great-granddaughter of a bacterium cell which is free living. This free living bacterium bacterial cell was consumed by an other cell and this remained as the stable guest in the cell. This mitochondria provided chemical energy to the cell and also protected the nutrient rich environment.  which surrounds it. This process of one organism residing in the other organism completely is called endosymbiosis.

5 0
3 years ago
Read 2 more answers
The main source of carbohydrates is meat, fish, cheese, and peas. <br> a. True<br> b. False
Sergio039 [100]
Its False because the main source of carbohydrates is bread and rice so the answer is b.False :))
i hope this be helpful
6 0
3 years ago
A newborn baby has extremely low birth weight (elbw) if it weighs less than 1000 grams. a study of the health of such children i
Harrizon [31]
<span>11.2 Florida voters. Florida played a key role in the 2000 and 2004 presidential elections. Voter registration records in August 2010 show that 41% of Florida voters are registered as Democrats and 36% as Republicans. (Most of the others did not choose a party.) To test a random digit dialing device that you plan to use to poll voters for the 2010 Senate elections, you use it to call 250 randomly chosen residential telephones in Florida. Of the registered voters contacted, 34% are registered Democrats. Is each of the boldface numbers a parameter or a statistic? Answer 41 % of registered voters are Democrats: parameter 36% of registered voters are Republicans: parameter 34% of voters contacted are Democrats: statistic 11.7 Generating a sampling distribution. Let’s illustrate the idea of a sampling distribution in the case of a very small sample from a very small population. The population is the scores of 10 students on an exam: The parameter of interest is the mean score μ in this population. The sample is an SRS of size n = 4 drawn from the population. Because the students are labeled 0 to 9, a single random digit from Table B chooses one student for the sample. (a) Find the mean of the 10 scores in the population. This is the population mean μ. (b) Use the first digits in row 116 of Table B to draw an SRS of size 4 from this population. What are the four scores in your sample? What is their mean ? This statistic is an estimate of μ. (c) Repeat this process 9 more times, using the first digits in rows 117 to 125 of Table B. Make a histogram of the 10 values of . You are constructing the sampling distribution of . Is the center of your histogram close to μ? Answer (a) μ = 694/10 = 69.4. (b) The table below shows the results for line 116. Note that we need to choose 5 digits because the digit 4 appears twice. (c) The results for the other lines are in the table; the histogram is shown after the table.</span>
7 0
3 years ago
What is the upper layer of the rainforest
Tomtit [17]
The upper most layer is the canopy
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following statements is false? - DNA polymerase joins nucleotides in one direction only. - The leading strand of DN
    13·1 answer
  • These four finch species lived together on an island. Each species ate something different: large seeds, small seeds, insects, a
    14·2 answers
  • Why do families members look alike but are not identical
    6·1 answer
  • What are the expected outcomes associated with digoxin therapy? select all that apply?
    13·1 answer
  • 1. A hypothesis and a theory are related because
    12·2 answers
  • Is Giardia viruses DNA or RNA viruses?
    5·1 answer
  • Angiosperms may self-fertilize if pollen from a flower is transferred to egg cells in the same flower, or they may cross-fertili
    15·1 answer
  • What are 2 characteristics of s waves
    7·1 answer
  • Which term names part of the peripheral nervous system?.
    15·1 answer
  • Based on the spectrums in the figure, rank the four galaxies in order of the speed with which they are moving away from Earth, f
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!