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45 Cards in this Set
- Front
- Back
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unlike dna rna contains...
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uracil
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why is it possible for an amino acid to be specified by more than one kind of codon?
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there are 63 different kinds od codons but only 20 amino acids
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a promotor is...
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the binding site for rna polymerase
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genes contain instructions for assembling...
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proteins
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what type of rna functions as a blueprint of the genetic code?
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mRNA
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a missense mutation is...
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a type of point mutation that changes the amino acid sequence
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rna contains the sugar...
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ribose
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what is produced during transcription?
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rna molecules
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which of the following terms is least closely related to the others?
- polypeptide - trna - anti codon - intron |
intron
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a mutation that involves a single nucleotide is called a...
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point mutation
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which of the following is found in both dna and rna?
- ribose, phosphate groups, adenine - phosphate groups, guanine and thymine - deoxyribose, phosphate groups, guanine - phosphate groups, gaunine and cytosine |
phosphate groups, guanine and cytosine
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elongation refers to the growth of the ______ during translation?
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polypeptide chain
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if a nucleic acid conatins uracil, it is...
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rna
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t/f a codon consists of 3 nucleotides?
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true
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t/f AUG is the sequence in the promotor region to which rna polymerase binds...
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f...TATATA
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the order of nitrogenous bases in dna determines the order of __________ in proteins
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amino acids
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suppose that part of an amino acid sequence of a protein changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-glycine-alanine. this change was most likely caused by a point mutation called a...
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missense mutation
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the ______ of a trna molecule determines the type of amino acid that bonds with the trna
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anti codon
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________ (type of rna) is used to assemble ribosomes in the ______ (location) of the cell
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rRNA; nucleolus
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the new strand of nucleotides created from DNA replication is often called...
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the daughter strand
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what is the function of the enzyme DNA ligase?
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join the okazaki fragments
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during DNA replication a DNA strand that has the bases CTAGGT produces a strand with the bases...
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GATCCA
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the sugar phosphate back bone is created by...
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the phosphate group of one nucleotide attaching to the sugar of another nucleotide
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the agarose gel in the electrophoreses process acts as...
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a matrix (or series of webs) to separate molecules based on size
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DNA in prokaryotes is...
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circular and called a plasmid
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which step of dna replicatin listed below comes first?
- add a segment of mucleic acids (called a primer) to the parent strand of dna - unzip the 2 parent dna stands - synthesize a new daughter strand of DNA - join the okazaki fragments |
unzip the 2 parents strands of dna
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avery experiments showed that bacteria are transformed by...
- carbs - lipids - proteins - none |
none
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the ermn used to describe one starnd of nucleotides running opposite of the other starnd of nucleotides in the double helix is...
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antiparallel
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dna is copied durinf a process called...
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replication
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in argarose gel electrophoresis, dna...
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moves towards the positive end of the gel
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in eukaryotes, dna
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is located in the nucleus
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dna replication results in 2 dna molecules...
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each with one new starnd and one priginal strand
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what is the function of the enzynme helicase?
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unzip the 2 parent dna strands
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humans have ____ chromosomes
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46
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which of the following include all the others?
- dna molecules, -histones -chromosomes - nucleosomesq |
-chromosomes
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the term deoxyribose refers to...
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a 5 carbon sugar
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dna is wrapped tightly around_____
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histones
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the replication of a dna double helix results in ____ new molecules of dna
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two
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the nitrogenous bases in dna are connected by _____
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hydrogen bonds
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the part of the nucleotide that givies it its identity is the _____
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nitrogenous base
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the watson and crick molecule of dna is a ____
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double helix
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in eukaryotes, dna is found in the ___of the cell
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nucleus
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agarose gel electrophoresis separates molecules based on ___ and ___
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size and charge
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adenine and guanine fall under the nitrogenous base type called _____
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purines
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dna stands for...
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deoxyribose nucleic acid
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