Chapter 7 & 8 Biology
15 Questions
| Attempts: 130
Questions and Answers
- 1.Center of an atom:
- A.
Nucleus
- B.
Enzyme
- C.
Nucleolus
- 2.Atoms of the same element with different numbers of neutrons are:
- A.
Isomers
- B.
Isotopes
- 3.Atoms of 2 or more elements chemically combined are:
- A.
Mixtures
- B.
Compounds
- 4.2 atoms that share electrons are held together by __________ bonds
- A.
Ionic
- B.
Covalent
- 5.Any substance that forms hydrogen ions in water is a(n)
- A.
Acid
- B.
Base
- 6.Carbon-12 and Carbon-14 are
- A.
Isotopes
- B.
Polymers
- C.
Radio-isotopes
- D.
Macromolecules
- 7.A very strong base might have a pH of
- A.
3
- B.
5
- C.
9
- D.
13
- 8.A membrane-bound fluid-filled sac
- 9.Closely stacked, flattened membrane sacs
- 10.The sites of protein assembly
- 11.A folded membrane that forms a network of interconnected compartments in the cytoplasm
- 12.Plant organelles that store starches or lipids or contain pigments
- 13.Eukaryotic cells have no true nucleus
- A.
True
- B.
False
- 14.A neutron has no charge
- A.
True
- B.
False
- 15.Biology is FUN!
- A.
True
- B.
False
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