QUESTIONS AND ANSWERS 100

Biochemistry - Exam 1 Practice EXAM

QUESTIONS AND ANSWERS 100%

SOLVED (Newest 2025)

In a bacterial cell, the DNA is in the:

• cell envelope.
• cell membrane.
• nucleoid.
• nucleus.
• ribosomes. - Correct Answers ✅nucleoid

A major change occurring in the evolution of eukaryotes from

prokaryotes was the development of:

A) DNA.

• photosynthetic capability.
• plasma membranes.
• ribosomes.
• the nucleus - Correct Answers ✅the nucleus

In eukaryotes, the nucleus is enclosed by a double membrane

called the:

• cell membrane.
• nuclear envelope.
• nucleolus.
• nucleoplasm.
• nucleosome. - Correct Answers ✅nuclear envelope 1 / 3

Biochemistry - Exam 1 Practice EXAM

QUESTIONS AND ANSWERS 100%

SOLVED (Newest 2025) The dimensions of living cells are limited, on the lower end by the minimum number of biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes such as oxygen. Except for highly elongated cells, they usually

have lengths and diameters in the range of:

• 0.1 µm to 10 µm.
• 0.3 µm to 30 µm.
• 0.3 µm to 100 µm.
• 1 µm to 100 µm.
• 1 µm to 300 µm - Correct Answers ✅0.3 µm to 100 µm

The bacterium E. coli requires simple organic molecules for

growth and energy—it is therefore a:

• chemoautotroph.
• chemoheterotroph.
• lithotroph.
• photoautotroph.
• photoheterotroph - Correct Answers

✅chemoheterotroph Which one of the following has the cellular components arranged in order of increasing size?

• Amino acid < protein < mitochondrion < ribosome 2 / 3

Biochemistry - Exam 1 Practice EXAM

QUESTIONS AND ANSWERS 100%

SOLVED (Newest 2025)

• Amino acid < protein < ribosome < mitochondrion
• Amino acid < ribosome < protein < mitochondrion
• Protein < amino acid < mitochondrion < ribosome
• Protein < ribosome < mitochondrion < amino acid -

Correct Answers ✅Amino acid < protein < ribosome < mitochondrion The three-dimensional structure of macromolecules is formed and maintained primarily through noncovalent interactions. Which one of the following is not considered a noncovalent interaction?

• carbon-carbon bonds
• hydrogen bonds
• hydrophobic interactions
• ionic interactions
• van der Waals interactions - Correct Answers ✅carbon-

carbon bonds Which one of the following is not among the four most abundant elements in living organisms?

• Carbon
• Hydrogen
• Nitrogen
• / 3