Biology 1100 - Principles of Biology » Fall 2019 » Week 3 Quiz

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Question #1
Which of the following is true about protein structure?
A.   Many proteins are composed of several different regions that are specialized to carry out specific functions.
B.   Specific functional regions within a protein are called motifs.
C.   If we replace one domain of a protein with a domain from a different protein using molecular biology techniques, then the entire protein will become inactive.
D.   A distinctive and recurrent sequence of structural elements within a protein, such as helix-turn-helix, is called a domain.
Question #2
The function of a protein depends specifically on its ____. If this is changed, then the function either changes or is lost.
A.   quaternary structure
B.   secondary structure
C.   primary structure
D.   tertiary structure
Question #3
Which of the following statements about protein structure is true?
A.   The final 3-D shape of a protein is determined entirely by its primary structure.
B.   Some diseases occur because a protein with the correct amino acid sequence fails to correctly fold into its final functional form.
C.   Denatured proteins are usually biologically active.
D.   If a protein’s environment is altered, the protein may change its shape or even unfold completely, a process called dissociation.
Question #4
Each nucleotide consists of three components: a pentose sugar, a phosphate group, and a nitrogenous base.
A.   FALSE
B.   TRUE
Question #5
In DNA, adenine always pairs with thymine and guanine always pairs with cytosine.
A.   FALSE
B.   TRUE
Question #6
You can identify the 3' end of a nucleic acid chain because it has a _____ at the very end of the chain.
A.   phosphate group
B.   base
C.   carbon
D.   uracil
E.   hydroxyl group
Question #7
Which of the following is NOT true about RNA?
A.   Can form three-dimensional structures
B.   Brings amino acids to growing polypeptide chains
C.   Can be copied from template DNA
D.   Forms strands millions of bases long
Question #8
Which of the following is NOT true about DNA?
A.   DNA can copy itself
B.   Each DNA strand has the information to make a full copy
C.   Bases are held together with hydrogen bonds
D.   Has a phosphodiester backbone

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