This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What is quantum tunnelling? What will be an ideal response? ... (Read 14 times)

jon_i

  • Hero Member
  • *****
  • Posts: 549
on: Jul 27, 2018
What is quantum tunnelling?
 
  What will be an ideal response?

Question 2

What was one reason that RNA was eventually replaced by DNA as the molecule of choice for storing genetic information?
 
  A) the bases that make up DNA became much more common
  B) DNA is far more stable than RNA
  C) DNA can catalyze its own replication
  D) the double helix of DNA is better able to correct errors in replication


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chem1s3

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jul 27, 2018
Answer to Question 1

Quantum tunnelling is the name given to the mechanism by which small particles can overcome energy barriers. For example, an electron in a low energy level can occasionally tunnel through an energy barrier to a higher energy level. The effect arises because the absolute energy of an object is never precisely known because of the uncertainty principle. The uncertainty, in absolute terms, is very small, but for quantum particles, the relative uncertainty can be significant and occasionally allows a particle to jump over an energy barrier.

Answer to Question 2

D


jon_i

  • Hero Member
  • *****
  • Posts: 549
Reply #2 on: Jul 27, 2018
Thanks


chem1s3

  • Sr. Member
  • ****
  • Posts: 320
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Allergic response by allergens. Allergic response by allergens.
Frequency distribution curve: interpatient variability in drug response. Frequency distribution curve: interpatient variability in drug response.
The inhibitory response of rods to light. When light bleaches rhodopsin molecules, the rods’ ... The inhibitory response of rods to light. When light bleaches rhodopsin molecules, the rods’ ...
The two-system view of the stress response. The two-system view of the stress response.
Schematic diagram showing polyclonal response by B cells against linear epitopes. Schematic diagram showing polyclonal response by B cells against linear epitopes.
The CRISPR/Cas system mediates an adaptive immune response in prokaryotes The CRISPR/Cas system mediates an adaptive immune response in prokaryotes
Video: Cytotoxic T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library