Exam IV Flashcards
Ch. 8, 9 & 10
After chromosomes are duplicated, each of the new copies is called a:
sister chromatid
Withing chromosomes DNA is wrapped around proteins called:
histones
A human karyotype showing 22 pairs of autosomes and two x chromosomes would be:
a normal female
The building blocks of nucleic acids are:
nucleotides
Amino acids are part of the DNA molecule. True or false
False
In DNA, complementary base paring occurs bw:
Guanine and Cytosine
Rosalind Franklin used this technique to determine many of the physical characteristics of DNA:
X-ray diffraction
Each DNA strand has a backbone that consists of alternating the following;
Sugar and Phosphate molecules
Replication of DNA is called semi-conservative bc it involves:
an old and new half
DNA polymerase;
An enzyme, adds new nucleotides to a DNA strand, proof reads DNA strands to see that they are correct, and can make rare mistakes that result in mutations.
This form of RNA carries the code from the DNA to the site where the protein is assembled:
Messenger RNA
This form of RNA carries amino acids to the ribosomes where amino acids are linked into a poly peptide chain:
Transfer RNA
What pairs with adenine in DNA?
Thymine
What pairs with adenine in RNA?
Uracil
Which of the following enzymes catalyzes the process of transcription?
RNA polymerase