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.   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.
B.   Specific functional regions within a protein are called motifs.
C.   Many proteins are composed of several different regions that are specialized to carry out specific functions.
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.   secondary structure
B.   quaternary structure
C.   primary structure
D.   tertiary structure
Question #3
Which of the following statements about protein structure is true?
A.   Denatured proteins are usually biologically active.
B.   The final 3-D shape of a protein is determined entirely by its primary structure.
C.   Some diseases occur because a protein with the correct amino acid sequence fails to correctly fold into its final functional form.
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.   TRUE
B.   FALSE
Question #5
In DNA, adenine always pairs with thymine and guanine always pairs with cytosine.
A.   TRUE
B.   FALSE
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.   uracil
C.   carbon
D.   hydroxyl group
E.   base
Question #7
Which of the following is NOT true about RNA?
A.   Can be copied from template DNA
B.   Can form three-dimensional structures
C.   Forms strands millions of bases long
D.   Brings amino acids to growing polypeptide chains
Question #8
Which of the following is NOT true about DNA?
A.   DNA can copy itself
B.   Bases are held together with hydrogen bonds
C.   Each DNA strand has the information to make a full copy
D.   Has a phosphodiester backbone

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