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Biochemistry - Exam 1 Practice Questions (A+ Pass) With 100% Error -Free Answers

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In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleoid. D) nucleus. E) ribosomes. - Correct Answer nucleoid A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: A) DNA. B) photosynthetic capability. C) ...

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  • September 24, 2024
  • 10
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • in a bacterial cell the dna is in the a cell en
  • a major change occurring in the evolution of eukar
  • in eukaryotes the nucleus is enclosed by a double
  • the dimensions of living cells are limited on the

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  • Biochemistry
  • Biochemistry

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Biochemistry - Exam 1 Practice Questions
(A+ Pass) With 100% Error -Free Answers
In a bacterial cell, the DNA is in the:
A) cell envelope.
B) cell membrane.
C) nucleoid.
D) nucleus.
E) ribosomes. - Correct Answer nucleoid

A major change occurring in the evolution of eukaryotes from prokaryotes was the
development of:
A) DNA.
B) photosynthetic capability.
C) plasma membranes.
D) ribosomes.
E) the nucleus - Correct Answer the nucleus

In eukaryotes, the nucleus is enclosed by a double membrane called the:
A) cell membrane.
B) nuclear envelope.
C) nucleolus.
D) nucleoplasm.
E) nucleosome. - Correct Answer nuclear envelope

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:
A) 0.1 µm to 10 µm.
B) 0.3 µm to 30 µm.
C) 0.3 µm to 100 µm.
D) 1 µm to 100 µm.
E) 1 µm to 300 µm - Correct Answer 0.3 µm to 100 µm

The bacterium E. coli requires simple organic molecules for growth and energy—it is
therefore a:
A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph - Correct Answer chemoheterotroph

Which one of the following has the cellular components arranged in order of increasing
size?
A) Amino acid < protein < mitochondrion < ribosome

, B) Amino acid < protein < ribosome < mitochondrion
C) Amino acid < ribosome < protein < mitochondrion
D) Protein < amino acid < mitochondrion < ribosome
E) Protein < ribosome < mitochondrion < amino acid - Correct Answer 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?
A) carbon-carbon bonds
B) hydrogen bonds
C) hydrophobic interactions
D) ionic interactions
E) van der Waals interactions - Correct Answer carbon-carbon bonds

Which one of the following is not among the four most abundant elements in living
organisms?
A) Carbon
B) Hydrogen
C) Nitrogen
D) Oxygen
E) Phosphorus - Correct Answer Phosphorus

The four covalent bonds in methane (CH4) are arranged around carbon to give which
one of the
following geometries?
A) linear
B) tetrahedral
C) trigonal bipyramidal
D) trigonal planar
E) trigonal pyramidal - Correct Answer tetrahedral

The macromolecules that serve in the storage and transmission of genetic information
are:
A) carbohydrates.
B) lipids.
C) membranes.
D) nucleic acids.
E) proteins - Correct Answer nucleic acids

Stereoisomers that are nonsuperimposable mirror images of each other are known as:
A) anomers.
B) cis-trans isomers.
C) diastereoisomers.
D) enantiomers.

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