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
nadya68 [22]
2 years ago
7

If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there?

Biology
1 answer:
Serggg [28]2 years ago
8 0

Answer: 4 Guanines

Explanation: Following Chargaff's ratio that describes the ration of purines to pyrimidines as 1:1, if there are 23 purines, it follows that there should be 23 pyrimidines; 15 Thymines should therefore be hydrogen bonded to 15 Adenines by complementary base pairing.

We are then left with 8 nucleotides composed of guanines and cytosines in complementary base pairs. This means that half that number (4) should be guanines and the rest cytosines.

You might be interested in
What happens when organic molecules decompose
Lynna [10]
When organic molecules decompose, energy is released. 
6 0
3 years ago
Read 2 more answers
What must be true for natural selection to happen?
Juliette [100K]

Answer:

pretty sure it’s B

6 0
2 years ago
So if earth's orbit is closer to the sun than Mars'
Talja [164]

Answer:

i am not really sure if you meant how manyhours or is it longeror shorter to make full orbit.

Explanation:

4 0
3 years ago
Please answer as many as you can.
Vlada [557]

So... I have'nt done this since November, but hope this helps.

1. A

2. A or B (most likely A)

3.B

4.B

4 0
3 years ago
True or false? the leukocytes of the innate immune system are b cells, macrophages, and neutrophils. true or false? the leukocyt
Arlecino [84]
Your answer i believe is true 
7 0
2 years ago
Other questions:
  • The right answer is glass paper and plastic
    14·2 answers
  • Example of homeostasis (not definition)
    7·2 answers
  • What country is the top oil producing and exporting country? What country is the top oil consuming and importing country?
    8·1 answer
  • In 1850 there was a large snowshoe rabbit population in Manitoba, Canada. Over the years, the winter coloration (the color of th
    15·1 answer
  • Clusters of gray matter that contain neuron cell bodies and lie within masses of white matter are the
    13·1 answer
  • 2 similarities between photosynthesis & cellular respiration
    11·1 answer
  • Please help me please please
    12·1 answer
  • (GIVING BRAINLIEST!!)
    11·2 answers
  • When co2 levels in the blood increase, how does the nervous system respond
    8·1 answer
  • If bicoid mRNA is injected at the anterior end of an egg from a bicoid mutant mother, what would the phenotype of the resulting
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!