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.   A distinctive and recurrent sequence of structural elements within a protein, such as helix-turn-helix, is called a domain.
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.   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.   quaternary structure
B.   secondary structure
C.   tertiary structure
D.   primary structure
Question #3
Which of the following statements about protein structure is true?
A.   Some diseases occur because a protein with the correct amino acid sequence fails to correctly fold into its final functional form.
B.   Denatured proteins are usually biologically active.
C.   If a protein’s environment is altered, the protein may change its shape or even unfold completely, a process called dissociation.
D.   The final 3-D shape of a protein is determined entirely by its primary structure.
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.   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.   base
B.   phosphate group
C.   uracil
D.   hydroxyl group
E.   carbon
Question #7
Which of the following is NOT true about RNA?
A.   Can be copied from template DNA
B.   Forms strands millions of bases long
C.   Brings amino acids to growing polypeptide chains
D.   Can form three-dimensional structures
Question #8
Which of the following is NOT true about DNA?
A.   Bases are held together with hydrogen bonds
B.   Has a phosphodiester backbone
C.   Each DNA strand has the information to make a full copy
D.   DNA can copy itself

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