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
drek231 [11]
3 years ago
8

Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table be

low shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.
Base Percent:
Adenine 23
Thymine
Cytosine 27
Guanine
Chemistry
1 answer:
katovenus [111]3 years ago
8 0

Answer:

Complementary base pairing rules

Thymine 23

Guanine 27

Explanation:

Complementary base pairing rules state that adenine always pairs with thymine, and cytosine always pairs with guanine in a double stranded DNA helix This means that in a double stranded DNA molecule, there will be exactly the same amount of thymine as adenine, and exactly the same amount of guanine as cytosine. Therefore, there is 23% of thymine, and 27% of guanine

You might be interested in
In the reaction mg 2hcl right arrow. mgcl2 h2 which element’s oxidation number does not change? cl mg h
netineya [11]

The correct answer is Cl.

Chlorine is a substance that's employed in industry and is present in a number of household goods. There are times when chlorine takes the form of toxic gas. Chlorine gas can be converted into a liquid by applying pressure and cooling so that it can be transported and stored. The term "oxidation number" refers to the number of electrons that an element's atom either loses or gains during the production of a compound. The charge that an atom seems to have when forming ionic connections with other heteroatoms is used to define an atom's oxidation number. Even if it develops a covalent bond, an atom with a higher electronegativity is given a negative oxidation state.

Learn more about oxidation numbers here:-

brainly.com/question/10079361

#SPJ4

5 0
1 year ago
Define the term hydrate
Salsk061 [2.6K]

Answer:

a compound,typically a crystalline one,in which water molecules are chemically bound to another compound or an element

3 0
2 years ago
What causes normal red blood cells to shrink
Savatey [412]

On the off chance that the red blood cells are smaller than ordinary, this is called microcytic anemia. The significant reasons for this sort are low-level iron, anemia, thalassemia.

8 0
3 years ago
Read 2 more answers
Classify each of the following substances as an acid or a base according to the Arrenius Definition:
Vladimir79 [104]

Answer:

i dont know lol

Explanation:

7 0
2 years ago
When 15.3 g of sodium nitrate, NaNO3,was dissolved in water in a calorimeter, the temperature fell from 25.00oC to 21.56oC. If t
satela [25.4K]

Answer:

20.468 kilo Joules is the enthalpy change when one mole of sodium nitrate dissolves.

Explanation:

Heat lost by solution ad calorimeter = Q

Heat capacity of solution ad calorimeter = C = 1071 J/°C

Change in temperature = ΔT = 21.56°C - 25.00°C = -3.44°C

Q=C\times Delta T

Q=1071 J/^oC\times (-3.44^oC)=-3,684.24 J

Heat gained by sodium nitrate = -Q = -(-3,684.24 J)=3,684.24 J

Moles of sodium nitrate = \frac{15.3 g}{85 g/mol}=0.18 mol

When 0.18 mole of sodium nitrate was dissolved in water 3,684.24 joulesof heat was absorbed by it.

Then heat absorbed by 1 mole of sodium nitrate :

\frac{3,684.24 J}{0.18}=20,468 J=20.468 kJ

1 J = 0.001 kJ

20.468 kilo Joules is the enthalpy change when one mole of sodium nitrate dissolves.

8 0
3 years ago
Other questions:
  • Give the chemical symbol for each of the following elements
    7·1 answer
  • Which particle cannot be accelerated by the electric or magnetic fields in a particle accelerator?
    9·1 answer
  • A chemist prepares a solution of silver perchlorate by measuring out of silver perchlorate into a volumetric flask and filling t
    10·1 answer
  • How many moles are there in 2.00 x 10^19 molecules of CCl4
    11·1 answer
  • Science 7 Grade 7. Can anyone please help me answer these science questions?
    14·2 answers
  • Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He.
    12·2 answers
  • Https://whereby.com/cherie16
    7·1 answer
  • What is salt<br><br> explinnn hhhhhh hh hh
    14·2 answers
  • I need some help with with question:
    10·1 answer
  • How many unbonded pairs of electrons are found on the alanine molecule
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!