A+ Answers


A __________ is the combination of base, a deoxyribose molecule, and a phosphate group.
A. chromosome
B. genome
C. DNA strand
D. nucleotide
The molecular structure of deoxyribonucleic acid dictates: A. the manner in which chromosomes are organized.
B. the way DNA encodes genetic information.—B  IS THE ANSWER
C. how molecules carry genetic information.
D. how chemical reactions burn food
In a DNA model, the alternating __________ and phosphate groups are represented on the two twisted ribbons.
A. thymine
B. guanine
C. sugar
D. cytosine
Before a cell __________, the double helix partially and rapidly unwinds.
A. dies
B. divides
C. replicates    C  IS THE ANSWER
D. bonds
The overall shape or conformation of the protein molecule is termed its __________ structure.
A. tertiary     A  IS THE ANSWER
B. primary
C. secondary
D. substrate
All enzymes are:
A. sugars.
B. proteins.   B  IS THE ANSWER
C. phosphates.
D. glycogens.
Bacteria contain rings of __________ called plasmids.
A. molecules
B. hydrocarbon
D. cells
DNA __________ utilize(s) unique fragments of DNA to identify a specific individual.
A. sourcing
B. fingerprinting
C. analysis
D. probes
__________ in cells, but not within cell nuclei, are vital to energy production.
A. Fatty acids
B. Hydrocarbons
C. Mitochondria
D. Proteins
Before __________ there was no hepatitis B vaccine.
A. transgenic modifications
B. recombinant DNA
C. electrophoresis
D. DNA probes
The biochemists who set out to decipher the genetic code concentrated on translating base language into __________ language.
A. codon
B. substrate
C. amino acid
D. DNA coded

Chromosomes consist of __________ compact structures of intertwined molecules of DNA in a human cell nucleus.
A. 39
B. 46
C. 48
D. 52
What is the totality of human hereditary information in molecular form called?
A. Chromosome
B. Human genome
What is a nucleotide?
A. The combination of nitrogenous base, sugar, and phosphate group
B. Phosphate units
C. Deoxyribose
D. The combination of deoxyribose and a phosphate group
Francis Crick established that genetic code was written in groupings of three DNA bases known as:
A. codons.
B. amino acid residues.
C. complementary bases
D. clonings.
Organic polymers of amino acids linked together by peptide bonds are called:
A. proteins.
B. codons.
C. genetic codes.
D. DNA bases.
Electrophoresis and __________ have made genetic fingerprinting a highly accurate and viable method for fighting crime.
A. x-ray diffraction
B. nuclear transfer
C. polymerase chain reaction
D. amniocentesis
The molecule with its reaction catalyzed by an enzyme is the:
A. catalyst.
B. active site.
C. substrate.
D. coenzyme.
Interferons are:
A. proteins that are produced by cells under viral attack.
B. genetically engineered proteins.
C. viruses that attack.
D. proteins that produce carbohydrates when they encounter a virus.
Diabetes is more effectively treated today through the creation of insulin by:
A. sickle-cell anemia.
B. recombinant DNA.
C. polymerase chain reaction.
D. electrophoresis.