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.   Specific functional regions within a protein are called motifs.
B.   Many proteins are composed of several different regions that are specialized to carry out specific functions.
C.   A distinctive and recurrent sequence of structural elements within a protein, such as helix-turn-helix, is called a domain.
D.   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.
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.   primary structure
C.   tertiary structure
D.   quaternary structure
Question #3
Which of the following statements about protein structure is true?
A.   If a protein’s environment is altered, the protein may change its shape or even unfold completely, a process called dissociation.
B.   Some diseases occur because a protein with the correct amino acid sequence fails to correctly fold into its final functional form.
C.   The final 3-D shape of a protein is determined entirely by its primary structure.
D.   Denatured proteins are usually biologically active.
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.   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.   base
B.   phosphate group
C.   hydroxyl group
D.   uracil
E.   carbon
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.   Has a phosphodiester backbone
B.   Bases are held together with hydrogen bonds
C.   DNA can copy itself
D.   Each DNA strand has the information to make a full copy

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