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
blsea [12.9K]
2 years ago
9

If 20% of a DNA sample is made up of thymine, T, what percentage of the sample is made vo

Biology
2 answers:
Ksenya-84 [330]2 years ago
6 0

Answer:

B. 30%

Explanation:

DNA has four type of nitrogenous bases in its nucleotides named as adenine, thiamine, cytosine and guanine and the abbreviations for these bases are A, T, C and G respectively. DNA is a double stranded bio molecule and the nucleotides of both the strands of DNA are joined with each other with the help of either double bonds or triple bonds which exist between the nitrogenous bases of its nucleotides. There are two type of bases, purines and pyrimidines. Adenine and guanine are purine bases while cytosine and thiamine are pyrimidine bases.

Chargaff's base pair rule says that the ratio of purine bases with respect to pyrimidine bases must be 1:1 ratio. It can be possible only if a purine base pairs with pyrimidine base of the adjacent DNA helix. So, adenine which is a purine always pairs up with thiamine which is a pyrimidine with the help of two hydrogen bonds while guanine being a purine always pairs up with cytosine which is a pyrimidine with the help of three hydrogen bonds. It simply means that a DNA molecule will have as many adenine as many there are thiamine. Also, for the same reason there will be as many cytosine as many there are guanine.

So, 20% of T means same amount of A which is 20%. Hence, A and T will together form 20% + 20% = 40% of the sample.

In the remaining 60% sample the amount of C and G is equal that means it will have 30% C and 30% G.

So, the answer is 30% C or cytosine.

Brut [27]2 years ago
3 0
B. 30% because it was in the internet and i just gave it to you
You might be interested in
The type of reproduction by which plants produce offspring from vegetative part is called
Helen [10]
I think that's asexual reproduction.
8 0
3 years ago
What is the use of protist in biological research?​
oee [108]

Answer:

The protists include plant-like organisms such as algae, animal-like organisms such as amoebas, and fungus-like organisms such as slime molds. They are also very important to us. ... The slime molds are important to ecosystems because they are decomposers, which release vital nutrients back into the environment.

Explanation:

4 0
3 years ago
What is the primary site of protein assembly within eukaryotic cells?
Tasya [4]

Answer:

What is the primary site of protein assembly within eukaryotic cells?

Ribosome helps in synthesis of protein in every eukaryotic cell, every cell organelle depend on ribosome for protein synthesis. It houses protein for others to make use.

Explanation:

5 0
2 years ago
Explain TWO strategic ways employed by microbes of extreme environments that enable them withstand harsh environmental and physi
Shkiper50 [21]

Answer:

Explanation:

Some microbes are thermophiles and they can survive in area with high temperature between 45 -80°C, they are chemoautotroph in nature, oxidizing sulphur to products acids such as sulfur in the environment. This acid also help them to better adapt to the environment as many thermophiles likes acidic environment.

Thermophiles body has saturated and straight chain fatty acid that helps prevent denaturation which enables them grow and thrive in harsh weather condition by providing the fluidity that is needed in membrane function.

Thermophiles are also small in sizes this ensure there stability.

5 0
3 years ago
Neurons are classified by the (1 point)
Alekssandra [29.7K]
<span>a. direction in which they carry impulses</span>
5 0
2 years ago
Read 2 more answers
Other questions:
  • Which type of ecosystem is most likely to be characterized by thick, rich soils?
    9·2 answers
  • In sweet pea, red flower color is controlled by two genes involved in the anthocyanin pathway, A and B. Both genes are required
    10·1 answer
  • In dogs, ... What are the possible Genotypes of the offspring and percentages? pick two
    11·1 answer
  • Why are interactions between biotic factors necessary ?
    9·1 answer
  • Which of the following is an example of using relaxation techniques? a. flight-or-flight response b. visualization c. rational r
    11·1 answer
  • In looking at the layer of rock, bones from the Pliohippus are found in layers above bones of the Mesohippus what does this tell
    15·1 answer
  • Hair would be dry and brittle without the presence of? A) sebaceous glands B) keratin C) melanin D) fat
    9·2 answers
  • Which best describes the process of conduction?
    10·1 answer
  • Question 3 (1 point)<br> SC<br> A product of unrestrained nuclear fission is the ________
    13·1 answer
  • I need help on this!!!!!!!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!