Test bank for Lehninger Principles of Biochemistry 5th Edition by David L. Nelson. All chapters covered already graded A+.Latest updated version -2025!!!!

,Chapter 1 The Foundations of Biochemistryx x x x




Multiple Choice Questionsx x




1. Cellular foundations x



Pages: 2-4 Difficulty: 1 Ans: C
x x x x



In a bacterial cell, the DNA is in the:
x x x x x x x x




A) cell envelope. x



B) cell membrane. x



C) nucleoid.
D) nucleus.
E) ribosomes.

2. Cellular foundations x



Page: 3 Difficulty: 1
x Ans: E x x



A major change occurring in the evolution of eukaryotes from prokaryotes was the development of:
x x x x x x x x x x x x x x




A) DNA.
B) photosynthetic capability. x



C) plasma membranes. x



D) ribosomes.
E) the nucleus. x




3. Cellular foundations x



Page: 3 Difficulty: 1
x Ans: B x x



In eukaryotes, the nucleus is enclosed by a double membrane called the:
x x x x x x x x x x x




A) cell membrane. x



B) nuclear envelope. x



C) nucleolus.
D) nucleoplasm.
E) nucleosome.

4. Cellular foundations x



Page: 4 Difficulty: 1
x Ans: C x x



The dimensions of living cells are limited, on the lower end by the minimum number of biomolecules necessary
x x x x x x x x x x x x x x x x x



for function, and on the upper end by the rate of diffusion of solutes such as oxygen.
x x x x x x x x x x x x x x x x x



Except for highly elongated cells, they usually have lengths and diameters in the range of:
x x x x x x x x x x x x x x




A) 0.1 m to 10 m.
x x x x



B) 0.3 m to 30 m.
x x x x



C) 0.3 m to 100 m.
x x x x



D) 1 m to 100 m.
x x x x



E) 1 m to 300 m.
x x x x

,2 Chapter 1 x x The Foundations of Biochemistry
x x x




5. Cellular foundations
x



Page: 4 xDifficulty: 2 Ans: B x x



Which group of single-celled micro-organisms has many members found growing in extreme
x x x x x x x x x x x



environments?
x




A) bacteria.
B) archaea.
C) eukaryotes.
D) heterotrophs.
E) none of the above.
x x x




6. Cellular foundations
x



Page: 5 xDifficulty: 2 Ans: B x x



The bacterium E. coli requires simple organic molecules for growth and energy—it is therefore a:
x x x x x x x x x x x x x x




F) chemoautotroph.
G) chemoheterotroph.
H) lithotroph.
I) photoautotroph.
J) photoheterotroph.

7. Cellular foundations
x



Page: 6-8 Difficulty: 2
x Ans: B x x



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




A) Amino acid < protein < mitochondrion < ribosome
x x x x x x x



B) Amino acid < protein < ribosome < mitochondrion
x x x x x x x



C) Amino acid < ribosome < protein < mitochondrion
x x x x x x x



D) Protein < amino acid < mitochondrion < ribosome
x x x x x x x



E) Protein < ribosome < mitochondrion < amino acid
x x x x x x x




8. Cellular foundations
x



Page: 10 Difficulty: 2
x Ans: A x x



The three-dimensional structure of macromolecules is formed and maintained primarily through
x x x x x x x x x x



noncovalent interactions. Which one of the following is not considered a noncovalent interaction?
x x x x x x x x x x x x x




A) carbon-carbon bonds x



B) hydrogen bonds x



C) hydrophobic interactions x



D) ionic interactions
x



E) van der Waals interactions
x x x




9. Chemical foundations x



Page: 11 Difficulty: 2
x Ans: E x x



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




A) Carbon
B) Hydrogen
C) Nitrogen
D) Oxygen
E) Phosphorus

, https://browsegrades.net/singlePaper/416797/testbank-for-lehninger-principles-of-biochemistry-
Chapter 1x The Foundations of Biochemistry
x x x 3



10. Chemical foundations x



Page: 12-13 x Difficulty: 1 Ans: B x x



The four covalent bonds in methane (CH4) are arranged around carbon to give which one of the
x x x x x x x x x x x x x x x x



following geometries?
x x




A) linear
B) tetrahedral
C) trigonal bipyramidal x



D) trigonal planar x



E) trigonal pyramidal x




11. Chemical foundations x



Page: 12 Difficulty: 1
x Ans: B x x



What functional groups are present on this molecule?
x x x x x x x




A) ether and aldehyde
x x



B) hydroxyl and aldehyde x x



C) hydroxyl and carboxylic acidx x x



D) hydroxyl and ester x x



E) hydroxyl and ketone x x




12. Chemical foundations x



Page: 14 Difficulty: 1
x Ans: D x x



The macromolecules that serve in the storage and transmission of genetic information are:
x x x x x x x x x x x x




A) carbohydrates.
B) lipids.
C) membranes.
D) nucleic acids. x



E) proteins.

13. Chemical foundations x



Page: 16 Difficulty: 1
x Ans: D x x



Stereoisomers that are nonsuperimposable mirror images of each other are known as:
x x x x x x x x x x x




A) anomers.
B) cis-trans isomers. x



C) diastereoisomers.
D) enantiomers.
E) geometric isomers. x