Chapter 5 Quiz Answers - Cell Biology I Lecture
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8 Terms
Each chromosome of DNA contains which of the following:
Several replication origins, one centromere, and two telomeres
Where is heterochromatin present?
In interphase chromosomes
Which of the following molecules has a positevely charged exterior that allows for DNA binding?
Histone proteins
Cytosine and guanine create _______ hydrogen bonds; whereas adenine and thymine create ________ hydrogen bonds which builds the double helix structure.
Three; two
Complete the sentence. Not all transcribed mRNA restuls in
Translated protein
Which of the following statements about the interphase chromosome and mitotic chromosmes is FALSE?
All of the statements are false.
Both are present at the same time inside the cell
interphase chromosomes are present in interphase and mitotic chromosomes are present in the mitotic phase
Both have euchromatin and heterochromatin
Only interphase chromosomes
Both are present during cell replication and division
Only mitotic chromosomes
Both have spindle fibers attached to them ready for separation
only mitotic chromosomes
The methylation, acetylation, and phosphorylation of the histone tail affect what process?
Gene expression
Why do histones have a high concentration of lysine and arginine?
To bind the negatively charged DNA backbone