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

Author Question: How many different nucleotide bases are used in nucleic acids in life on Earth (consider both DNA ... (Read 193 times)

saliriagwu

  • Hero Member
  • *****
  • Posts: 537
on: Jul 27, 2018
How many different nucleotide bases are used in nucleic acids in life on Earth (consider both DNA and RNA)?
 
  A) 25
  B) 4
  C) 20
  D) 5

Question 2

When an atom absorbs a photon containing energy, any of the following can happen except which?
 
  A) The atom becomes excited.
  B) The atom is ionized.
  C) An electron moves from an upper energy level to a lower one.
  D) An electron moves from a lower energy level to an upper one.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

eliasc0401

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

C


saliriagwu

  • Hero Member
  • *****
  • Posts: 537
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


eliasc0401

  • Sr. Member
  • ****
  • Posts: 338
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Life cycle of Obelia, a colonial cnidarian. Life cycle of Obelia, a colonial cnidarian.
These species are all at risk of extinction. Species with “slow” life-h These species are all at risk of extinction. Species with “slow” life-h
Earth’s Magnetosphere Earth’s Magnetosphere
The second half of life brings a change from outward to inward concerns and from physical to ... The second half of life brings a change from outward to inward concerns and from physical to ...
Acids and Bases Acids and Bases
Major Events in the History of Life Major Events in the History of Life
Video: Neural regulation of blood pressure - baroreceptor and chemoreceptor reflexes

For a complete list of videos, visit our video library