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Advanced Biology
Test Description: Chapter 11 Test Review
Instructions: Answer all questions to get your test result.
1) Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called
A
operators
B
activators.
C
regulators
D
repressors
2) Both prokaryotic and eukaryotic cells use ________ to turn certain genes on or off.
A
intron segments
B
nucleosome packing
C
proteins
D
RNA transcriptase
3) RNA splicing involves the
A
removal of introns from the molecule.
B
addition of a nucleotide cap to the molecule.
C
removal of exons from the molecule.
D
addition of a nucleotide tail to the molecule.
4) Which of the following permits a single gene to code for more than one polypeptide?
A
retention of different introns in the final version of the different mRNA strands
B
alternative RNA splicing
C
genetic differentiation
D
addition of different types of caps and tails to the final version of the mRNA strands
5) In multicellular organisms, the coordination of cellular activities relies on
A
cell-to-cell signaling and signal transduction pathways.
B
the availability of certain key nutrients as cells divide.
C
operons.
D
cell receptors that detect transcription factors.
6) To initiate a signal transduction pathway, a signal binds to a receptor protein usually located in the
A
ER
B
plasma membrane
C
nucleus.
D
cytoplasm
7) Transcription factors attach to
A
DNA
B
mRNA
C
plasma membrane receptors.
D
signal molecules
8) Why can some plants be cloned from a single cell?
A
Plant cells can produce genes to replace those lost during development.
B
Plant cells are capable of self-renewal by utilizing cellular components from adjacent cells.
C
Plant cells do not differentiate even when mature, so any cell can grow into an entire plant.
D
Plant cells can dedifferentiate and give rise to all of the specialized cells required to produce an entire plant.
9) The cloning of Dolly the sheep
A
demonstrated, for the first time, that eggs are haploid and body cells are diploid.
B
demonstrated that the nuclei from differentiated mammalian cells can retain their full genetic potential.
C
revealed that cloned mammals most resemble the egg donor.
D
demonstrated that differentiated cells contain only a fraction of their full genetic potential.
10) The use of cloning to produce special embryonic stem cells is called
A
reproductive cloning.
B
therapeutic cloning.
C
transplantational cloning.
D
regenerative cloning.
11) Adult stem cells have limited therapeutic potential
A
because they lack a complete set of genes.
B
because their developmental potential is limited to certain tissues.
C
because they are fully differentiated.
D
due to their excessive numbers in tissues.
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