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Biology Exam 2
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| Question | Answer |
|---|---|
| What is the sequence of bases on the complementary strand of this I-DNA strand? 3' TACCTTCAGCCT 5'. | ATGGAAGTCGGA |
| What is the sequence of bases on the strand of mRNA that is synthesized from the original strand of DNA? | AUGGAAGUCGGA |
| Name the organelle where-the synthesis of mRna takes place. | Nucleus |
| What is the anticodon on the TRNA for the first (1st) codon on mRNA transcribed from this segment of DNA, 3' TACCTTCAGCCT 5'? | TAC |
| During "normal conditions' proteins are essential for all the following except _____: | production of energy |
| Name the organelle where the codon and anticodon couplings take place. | Ribosome |
| ____ is coiled in a double helix. | DNA |
| ____ contains thymine. | DNA |
| ____ contains cytosine. | DNA and RNA |
| The final electron/ hydrogen acceptor in aerobic respiration is ____. | Oxygen |
| ____ contains uracil. | RNA |
| ____ brings amino acids to the ribosome. | TRNA |
| ____ is involved in transcription. | DNA polymerase |
| The genetic code depends on bases (nucleotides) in groups of ____. | Three |
| If mRNA is transcribed from a chain of DNA with the base sequence 3' CATTAG 5', the mRNA will have the sequence | GUAAUC |
| DNA, but not RNA, contains ____. | thymine |
| Transfer RNA functions in ____. | carrying amino acids to the correct site on the mRNA |
| How many amino acids would the polypeptide encoded by 3' ACCTCCCCGCAT 5' have? | Four |
| The second codon on the mRNA derived from the segment will be ____. 3' ACCTCCCCGCAT 5' | AGG |
| The anticodon of the tRNA for the third codon on the MRNA will be ____. 3' ACCTCCCCGCAT 5' | CCG |
| Through gene codes ultimately for all aspects of a protein's structure, it codes directly only for ____. | a primary structure |
| A certain gene codes for a polypeptide that is 126 amino acids long. The portion of the gene that codes for this polypeptide is probably how many nucleotides long? | 378 |
| A nonsense mutation is one in which the substitution of one nucleotide for another results in a triplet ____. | that does not code for any amino acid |
| The nucleolus is a specialized region of a chromosome where the tRNA is synthesized. | False |
| In base substitution mutations only a single nucleotide of a gene is altered. | True |
| Some amino acids are specified by several "synonymous" codons. | True |
| How many codes are there from the universal genetic code? | 64 |
| In the genetic code how many stop codes are there? | 3 |
| The genetic code, DNA, carries codes for ____. | Proteins |
| In the last stage of aerobic respiration, ____ is the final acceptor of electrons that originally reside in glucose. | Oxygen |
| In alcoholic fermentation, ____ is the final acceptor of electrons stripped from glucose. | acetaldehyde |
| The germentation pathways produce no more ATP beyond the small yield from glycolysis, but the remaining reactions ____. | Regenerate |
| In certain organisms and under certain conditions, ____ can be used as ab energy alternative to glucose. | Fatty acids, amino acids, glycerol. |
| Electron transfer chains involve ____. | Enzymes and cofactors, and electron transfers. |
Created by:
madam15
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