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
d1i1m1o1n [39]
3 years ago
5

What holds the two strands of a DNA molecule together?A. Ionic bonds between negatively and positively charged ionsB. Covalent b

onds between sugars and phosphatesC. Brüno's interactionsD. Hydrogen bonds between complementary base pairs
Chemistry
1 answer:
statuscvo [17]3 years ago
8 0

Answer:

D. Hydrogen bonds between complementary base pairs89

Explanation:

A DNA molecule is composed of two long polynucleotide chains made of four types of nucleotide subunits, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). These nucleotides are joined by covalent bonds forming a phosphate-sugar backbone. <em>These strands are held to one another with hydrogen bonds between the base portions of complementary nucleotides.</em>

I hope you find this information useful and interesting! Good luck!

You might be interested in
Distance from shore (in cm) Depth
Maurinko [17]

Answer:

Its 25

Explanation:

Njnnnc

6 0
3 years ago
The standard cell potential Ec for the reduction of silver ions with elemental copper is 0.46V at 25 degrees celsius. calculate
Cloud [144]

Answer : The \Delta G for this reaction is, -88780 J/mole.

Solution :

The balanced cell reaction will be,  

Cu(s)+2Ag^+(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)

Here, magnesium (Cu) undergoes oxidation by loss of electrons, thus act as anode. silver (Ag) undergoes reduction by gain of electrons and thus act as cathode.

The half oxidation-reduction reaction will be :

Oxidation : Cu\rightarrow Cu^{2+}+2e^-

Reduction : 2Ag^++2e^-\rightarrow 2Ag

Now we have to calculate the Gibbs free energy.

Formula used :

\Delta G^o=-nFE^o

where,

\Delta G^o = Gibbs free energy = ?

n = number of electrons to balance the reaction = 2

F = Faraday constant = 96500 C/mole

E^o = standard e.m.f of cell = 0.46 V

Now put all the given values in this formula, we get the Gibbs free energy.

\Delta G^o=-(2\times 96500\times 0.46)=-88780J/mole

Therefore, the \Delta G for this reaction is, -88780 J/mole.

7 0
4 years ago
Which of the following accurately describes rill erosion?
worty [1.4K]

Answer:

C. Runoff from heavy rainfall forms narrow, shallow channels.

Explanation:

Erosion is the gradual washing away of the top layer of the soil or earth on which plant grows. There are three main types of erosion which are:

1. Sheet erosion

2. Gully erosion

3. Rill erosion

Rill erosion occurs when a soil layer is gradually being washed away by narrow stream channels called streamlets on the surface. After a heavy downpour, the streamlets facilitates the movement of water on the ground surface and in turn, earth materials are worn away.

When these streamlets becomes deeper, they form gullies. Gullies results into gully erosion.

When runoff removes soil and loose sediment in thin layers it is called sheet erosion.

4 0
3 years ago
Yo fm on ig chs_luucy. ill give u brainleist .
xz_007 [3.2K]
Alright bet! Say less
7 0
3 years ago
Read 2 more answers
How many moles of n are in 0.163 g of n2o?
zimovet [89]

First convert 0.163 grams of N2O to mol by dividing it with the molecular weight. The molecular weight of N2O is 44 grams/mol. The answer would be 3,79x10^-3. Then multiply it with 2 since there are 2 Nitrogen in one mole of N2O. Therefore, there are 7.41x10^-3 moles of Nitrogen. 

3 0
4 years ago
Read 2 more answers
Other questions:
  • How many grams of hydrogen are contained in 2.00 mol of C6H7N
    9·1 answer
  • 2. Where do traits come from?<br>3. There are sections of DNA called genes. What do genes do?<br>​
    7·1 answer
  • What can be said about the spontaneity of this reaction? cdiamond→cgraphite
    11·2 answers
  • A 1 mol sample of gas has a temperature of 225K, a volume of 3.3L, and a pressure of 500 torr. What would the temperature be if
    13·1 answer
  • Consider the image below. What is not accurate about these models?
    5·2 answers
  • In which of the following is the symbol for the ion and the number of electrons it contains given correctly?
    10·1 answer
  • Help!<br> The quantity of matter anything contains.<br> A. weight<br> B. mass<br> C. volume
    9·2 answers
  • What is the coefficient of Oxygen in the balanced reaction below:
    7·1 answer
  • What is the electronic structure of an atom with a proton number 11 and mass number 23
    14·1 answer
  • Giving Brainlyest
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!