Cell Structure and Chemistry Quiz

Question 1

All cells possess

Answer 1

a plasma membrane, cytoplasm, ribosomes, DNA as the genetic material

Question 2

Why do hydrogen and oxygen form polar covalent bonds within water molecules?

Answer 2

oxygen is more electronegative than hydrogen, generating a partial negative charge near the oxygen atoms

Question 3

Which type of bond represents a bond between two water molecules?

Answer 3

hydrogen bond

Question 4

The three domains of life are

Answer 4

bacteria, archaea, eukarya

Question 5

What is a difference between prokaryotic and eukaryotic cells?

Answer 5

both cells have cytoplasm but prokaryotic cells lack a nucleus

Question 6

What is electronegativity?

Answer 6

the measure of how strongly an atom “attracts” electrons

Question 7

It is advantageous for cells to be small because

Answer 7

smaller cells have smaller volumes relative to their surface areas, which increases efficient transport

Question 8

Carbons atomic number is 6. How many bonds can it form?

Answer 8

4

Question 9

Water’s property of adhesion is due to

Answer 9

the breaking and remaking of its hydrogen bonds

Question 10

How do buffers help maintain constant pH?

Answer 10

buffers absorb excess hydrogen and hydroxide ions produced by chemical reactions