Quiz#5 (exam 2)
The sugar in RNA nucleotides is____
Ribose
DNA vaccines____.
Show promises in animal studies and now in clinical trials
Nucleosome's are bead-like structures_____.
Composed of histone wrapped with DNA
After contracting SARS, about _____ % of the infected died.
10%
The chemical formula for glucose, C6H12O6, represents ___ atoms and ___ molecules
24;1
If one strand of DNA has the sequence 5'CCGTAGCA'3 The complementary strand would be written as ____
3' GGCATCGT '5
Maurice Walkins and Rosalind Franklin obtained x-ray diffraction photographs that indicated that DNA has a_____ shape with a constant diameter
Helix
In the Watson - creek model of DNA sequence, the polynucleotide chains____.
Are oriented in opposite directions
Once the strands of DNA are separated, the enzyme DNA Polymerase ____ and links nucleotides together.
Reads the nucleotide sequence of the template strand
In the early 1950s, James Watson and Francis crick____.
Began to work out the structure of DNA by organizing the information about DNA that was already available
Each chromosome contains a constricted region called a(n) _____ where sister chromatids attach
Centromere
A phosphate group is a compound containing phosphorus _____.
Chemically bonded to 4 oxygen molecules
One double stranded DNA molecule combined with proteins form ____ which is visible as clumps or threads in the cell nucleus
Chromatin
Telomerase is an enzyme that adds telomere repeats to the ends of ____
Chromosomes
DNA polymerase catalyzes the synthesis of_____
DNA
In June 2013, the US Supreme Court ruled that if a gene is removed from the human body and purified it can be patented. True or false?
Falls
Because RNA is a single-stranded, it does not participate in the regulations of gene expression. True or false?
False
DNA contains two identical poly nucleotide chains. True or false?
False
In the early 20th century most scientist believe that only nucleic acid's were complex enough to carry genetic information. True or false?
False
SARS symptoms include ____
High fever, headache, and respiratory problem
Proteins contain 20 different subunits ____
In the form of amino acids
Bacteriophages are viruses that _____.
Infect and copy themselves inside bacterial cells
Friedrich Miescher, after he began to study the chemical composition of the nucleus, was one of the first too____
Isolate and purify a cellular organelle
Telomere are short DNA sequences_____
Located at each end of a chromosome
Histones are the ____
Major class of proteins in chromatin
Purines and pyrimidines are two classes of organic bases found in
Nucleic acid's
A basic building block of DNA and RNA is a(n) ____
Nucleotide
A(n)____ is made up of sugar, a phosphate, and a nitrogenous base.
Nucleotide
The search for a ____ treatment led to the discovery that DNA carry genetic information
Pneumonia
Cytosine, uracil, and thymine are singular ringed nitrogen containing organic bases called___
Pyrimidines
A replicated DNA molecule contains one new strand and one old strand. True or false?
True
Rosalind Franklindid not share a part of the 1962 noble prize for medicine of psychology because she died four years earlier. True or false?
True
The interphase nucleus has an internal structure in which each chromosome occupies a distinct region called a chromosome territory. True or false?
True
The process of transferring genetic info between cells is accomplished with a transformation factor called DNA. True or false?
True
adenine and guanine are nitrogen containing bases found in nucleic acid's. True or false?
True
In RNA the base ____ takes the place of the base thymine
Uracil
