Course

Introductory Biology

Study Pack

Set 2 Atoms And Molecules The Chemical Basis Of Life

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Question 1

(Multiple Choice)

Free
What differentiates an organic compound from an inorganic compound?

A) An organic compound lacks isotopes.
B) An organic compound contains carbon.
C) An organic compound lacks valence electrons.
D) An organic compound is basic rather than acidic.
E) An organic compound contains two or more atoms.

Answer

Question 2

(Multiple Choice)

Free
What is the difference between a stable isotope and a radioisotope?

A) A stable isotope emits light.
B) A radioisotope emits radiation.
C) A stable isotope emits radiation.
D) A stable isotope absorbs radiation.
E) A radioisotope has an unequal number of protons and electrons.

Answer

Question 3

(Multiple Choice)

Free
Which substance is a reactant in the following chemical equation? CO2 + H2O ↔ H2CO3

A) water
B) carbon
C) oxygen
D) hydrogen
E) carbonic acid

Answer