UCI Bio 93 Midterm 2 Exam Questions and Answers |Complete Solutions
Graded A+ |100% Correct
Photophosphorylation Process when a light reaction makes ATP, using chemiosmosis to add
a phosphate to ADP
Light reactions Solar energy is converted into chemical energy
Photosystem I One of the two types of photosystems in light reactions
Photosystem II One of the two types of photosystems in light reactions
Photosystem Composed of a reaction-center complex and light harvesting complexes
Polyribosomes Many ribosomes that translate a single mRNA simultaneously
Mutation A change in the genetic material
Point mutation A chemical change in 1 base pair of a gene
Mutagens Physical or chemical agents that can cause mutations
Nucleosomes Consist of DNA and histones
DNA polymerase Catalyzes the synthesis of new DNA by adding nucleotides to an existing
chain
Primase Synthesizes primers to start DNA replication
, Okazaki fragments Sections of RNA in the lagging strand
DNA ligase Bonds the Okazaki fragments to the leading strands
Telomeres Found at the end of a nucleotide sequence and prevent the erosion of the genes
at the end of DNA
Telomerase Catalyzes the lengthening of telomeres
Gene expression Process of how DNA directs the synthesis of proteins
Transcription The synthesis of RNA
Translation Synthesis of a polypeptide using the info in mRNA
tRNA Helps a cell translate an mRNA message into proteins
Anticodons Found on the tRNA and are complementary base pairs of the mRNA
Aminoacyl-tRNA Synthetases Enzyme that connects a tRNA and an amino acid
Wobble Flexible pairing that allows some tRNAs to bind to more than one codon
Poly A tail Connected to the 3' end of RNA
DNA replication Occurs in the 5' to 3' direction
Graded A+ |100% Correct
Photophosphorylation Process when a light reaction makes ATP, using chemiosmosis to add
a phosphate to ADP
Light reactions Solar energy is converted into chemical energy
Photosystem I One of the two types of photosystems in light reactions
Photosystem II One of the two types of photosystems in light reactions
Photosystem Composed of a reaction-center complex and light harvesting complexes
Polyribosomes Many ribosomes that translate a single mRNA simultaneously
Mutation A change in the genetic material
Point mutation A chemical change in 1 base pair of a gene
Mutagens Physical or chemical agents that can cause mutations
Nucleosomes Consist of DNA and histones
DNA polymerase Catalyzes the synthesis of new DNA by adding nucleotides to an existing
chain
Primase Synthesizes primers to start DNA replication
, Okazaki fragments Sections of RNA in the lagging strand
DNA ligase Bonds the Okazaki fragments to the leading strands
Telomeres Found at the end of a nucleotide sequence and prevent the erosion of the genes
at the end of DNA
Telomerase Catalyzes the lengthening of telomeres
Gene expression Process of how DNA directs the synthesis of proteins
Transcription The synthesis of RNA
Translation Synthesis of a polypeptide using the info in mRNA
tRNA Helps a cell translate an mRNA message into proteins
Anticodons Found on the tRNA and are complementary base pairs of the mRNA
Aminoacyl-tRNA Synthetases Enzyme that connects a tRNA and an amino acid
Wobble Flexible pairing that allows some tRNAs to bind to more than one codon
Poly A tail Connected to the 3' end of RNA
DNA replication Occurs in the 5' to 3' direction
