Biochemistry – Comprehensive Study Material

, Chapter 1: Life


Matching

A) Phylogenetic
B) q/T
C) Carbon
D) H°
E) H – TS
F) halobacteria
G) equilibrium
H) entropy
I) thermoacidophiles
J) polymers


1. The most abundant chemical element in the human body is _____.

Ans: C
Level of Difficulty: Easy
Section: 1-5. The Origin of Life

2. Evolutionary relationships can be compared using a ______ tree.

Ans: A
Level of Difficulty: Easy
Section: 1-2. Eukaryotes

3. The organisms most likely to be found in a brine solution would be ______.

Ans: F
Level of Difficulty: Easy
Section: 1-1. Prokaryotes


4. The organisms most likely to be found in high temperature environments would be ______.

Ans: I

,Level of Difficulty: Easy
Section: 1-1. Prokaryotes

Multiple Choice

5. The atmosphere of early earth probably contained the following molecules:
A) H2O, CO2, N2 , CH4, and NH3.
B) H2O, CO2, CH4, C6H6O6, and NH3.
C) H2O, CO2, CH4, C6H6O6, and COOHCH2NH3.
D) H2O, CO2, CH4, COOHCH2NH3, and NH3.
E) none of the above

Ans: A
Level of Difficulty: Moderate
Section: 1-1. Prokaryotes

6. The biological classification system categorizes organisms into the domains:
A) bacteria, eukarya, and vertebrate.
B) archaea and eukarya.
C) bacteria, eukarya, and archaea.
D) eukarya and bacteria.
E) none of the above

Ans: C
Level of Difficulty: Easy
Section: 1-1. Prokaryotes

7. The theory of evolution includes the following principles:
A) evolution is not directed toward a specific goal.
B) evolution is ongoing, and is constrained by its past.
C) evolution requires some sloppiness for adaptation to changes.
D) A and B
E) A, B, and C

Ans: E
Level of Difficulty: Easy
Section: 1-5. The Origin of Life

8. The term molecular weight is a term used by biochemists that refers to
A) the density of a particle.

, B) a dimensionless quantity that is defined as the ratio of the mass of the particle to 1/12 the
mass of a 12C atom.
C) Daltons divided by the mass of a hydrogen atom.
D) all of the above
E) none of the above

Ans: B
Level of Difficulty: Easy
Section: 1-1. Prokaryotes

9. Which of the following is a similarity between all prokaryotes and all eukaryotes?
A) Both contain DNA in a nucleus
B) Both contain certain of the same membrane bound cell organelles (like mitochondria, Golgi
complexes etc)
C) Both have a cytoskeleton
D) All of the above are similarities between prokaryotes and eukaryotes
E) None of the above are similarities between prokaryotes and eukaryotes

Ans: E
Level of Difficulty: Easy
Section: 1-1. Prokaryotes, 1-2. Eukaryotes

10. Which of the following statements concerning prokaryotes is false?
A) Prokaryotes are made up of two major groupings: the eubacteria and the archaea, which are
as different from each other as from the eukaryotes.
B) Prokaryotes are generally much smaller than the eukaryotic cells.
C) Prokaryotes are one branch of the newer, more accurate phylogenic tree made up of
prokarya, archaea and eukarya
D) Prokaryotes do not have organelles
E) None of the above are false

Ans: C
Level of Difficulty: Easy
Section: 1-1. Prokaryotes, 1-2. Eukaryotes

11. Which of the following is not true of eukaryotes:
A) They contain organelles like mitochondria, chloroplasts, ribosomes, and a nucleus
B) They are usually 10 to 100 microns in diameter
C) They can be both uni or multicellular
D) They are also called archaea
E) All of the above are true of eukaryotes