Exam (elaborations)

Test Bank for Molecular Biology of the Cell, 7th Edition by Bruce Alberts

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Course
Microbiology

Institution
Microbiology

Test Bank for Molecular Biology of the Cell 7e 7th Edition by Bruce Alberts; Rebecca Heald; Alexander Johnson; David Morgan; Martin Raff; Keith Roberts; Peter Wal. Full Chapters test bank are included - Chapter 1 to 24 Chapter 1: Cells, Genomes, and the Diversity of Life Chapter 2: Cell Che...

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Uploaded on January 19, 2024
Number of pages 720
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Test Bank for Molecular Biology of the Cell 7th edition Alberts
Full Chapters are included with answers Chap 1 - 24
Complete guide - Latest Edition

Chapter 01

1. What is NOT true of all cells?

a. They have membrane transport proteins.

b. They synthesize proteins on the ribosome.

c. They replicate their genome by DNA polymerization.

d. They transcribe their genetic information by RNA polymerization.

e. They use RNA as a template for genomic DNA polymerization.

2. Imagine a segment of DNA (within a gene) encoding a certain amount of
information in its nucleotide sequence. When this segment is fully transcribed into
mRNA and then translated into protein, in general, what happens?

a. The protein sequence would carry more information compared to the DNA
and mRNA sequences, because its alphabet has 20 letters.

b. The protein sequence would carry less information compared to the DNA
and mRNA sequences, because several codons can correspond to one
amino acid.

c. The amount of information in the mRNA sequence is lower, because the
mRNA has been transcribed using only one of the DNA strands as the
template.

d. The amount of information in the mRNA sequence is higher, because
several mRNA molecules can be transcribed from one DNA molecule.

3. Scientists discover more than 10,000 new species of living organisms every year.
What is shared between all of these organisms?

a. They are made of cells, whose nuclei enclose their DNA.

b. They obtain their energy from sunlight.

, c. They produce and use adenosine triphosphate (ATP).

d. Their genome contains at least 1000 genes.

4. What is NOT true of the plasma membrane?

a. It is totally impermeable.

b. It contains proteins that move materials across the plasma membrane.

c. It contains enzymes that catalyze reactions within the cell.

d. It is made of molecules that are both hydrophilic and hydrophobic.
e. It allows waste materials to be removed from the cell.

5. What is NOT a source of movement in a cell?

a. Random thermal motions

b. Gliding in a specific direction without energy input

c. Motor proteins moving large assemblies

d. Ions moving across a membrane due to ion pumps
e. Proteins moving the cell forward

6. Which of the following is NOT a source of movement in a cell?

a. Random thermal motions

b. Gliding in a specific direction without energy input

c. Motor proteins moving large assemblies

d. Ions moving across a membrane due to ion pumps
e. Proteins moving the cell forward

7. Which of the following processes that happens inside of a cell does NOT normally
require consumption of free energy by the cell?

a. Replication of the genetic material

, b. Import of nutrients from the environment

c. Diffusion of small molecules within the cell

d. Regulation of gene expression
e. Synthesis of enzymes that catalyze cellular reactions

8. What is NOT true regarding the tree of life?

a. Most bacteria and archaea have 1000 to 6000 genes in their genomes.

b. Eukaryotes are more similar to archaea than to bacteria with respect to the
proteins that act on their DNA

c. Most bacteria and archaea have genome sizes between 1 and 10 million
nucleotide pairs, whereas eukaryotic genomes can be millions of times
larger.

d. Archaeal species were thought to belong to the eukaryotic world before
sequence analysis placed them in a separate domain of life.

e. Photosynthetic bacteria are thought to be the ancestors of the eukaryotic
chloroplasts.

9. Three bacteria samples are harvested, each from different boiling volcanic mud
pots on three different continents. In order to assess their evolutionary
relationships, the researcher should do what?

a. Identify the structures they use for motility.

b. Compare their nutrient sources.

c. Analyze the differences in their rRNA genes.

d. Compare the molecular makeup of their outer cell wall.

e. Identify the other species living nearby in the same ecosystem.

10.Several newly discovered organisms have recently had their genomes sequenced
for the first time. Which sample is most likely a eukaryote?

Sample Name Number of genes in the genome

, S. ciencus 2554

S. tudentus 4352

P. fessora 26056

R. searcherus 6042

G. aduationa 2043

a. S. ceincus

b. S. tudentus

c. P. fessora

d. R. searcherus

e. G. aduationa

11.What would you NOT expect to find in a bacterial cell?

a. Swimming using flagella

b. Having a cell wall around the plasma membrane

c. ATP production in mitochondria

d. Protein production on the ribosome

e. Sexual exchange of DNA with other bacteria

12.Imagine two spherical cells, one of which is 5000 times larger in volume than the
other. The smaller is a prokaryote, and the larger cell is a eukaryote with 20% of
its volume confined in a spherical nucleus. If the diameter of the prokaryotic cell is
0.7 micrometers, what is the diameter of the nucleus in the eukaryotic cell in
micrometers?

a. 5000

b. 1000

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Exam (elaborations)

Test Bank for Molecular Biology of the Cell, 7th Edition by Bruce Alberts

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