Biology 1310 Test 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Name the organelle where the synthesis of mRNA takes place. | Nucleus
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| Name the organelle where the codon and anticodon couplings take place. | ribosome
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| ____ is coiled in a double helix | DNA
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| ___ contains thymine | DNA
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| ___ and ___ contain thymine | DNA RNA
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| ___ contains uracil | RNA
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| ___ brings amino acids to the ribosome | mRNA
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| ______ is present in the ribosome | Ribosomal RNA
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| ____ is involved in transcription | DNA polymerase
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| ___ is involved in translation | RNA
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| The genetic code depends on bases in groups of ____ | three
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| If mRNA is transcribed from a chain of DNA with the base sequence 3'CATTAG5' the mRNA will have the sequence | GUAAUC
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| DNA but not RNA contains ____ | thymine
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| Transfer RNA functions in ____ | Carrying amino acids to the correct site on the mRNA
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| How many amino acids would the polypeptide encoded by this gene segment have? | four
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| The second codon on the mRNA derived from the segment will be | UGG
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| The anticodon of the tRNA for the third codon on the mRNA will be | BGGF
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| According to the current ideas about the DNA genetic code which one of the following statements is false? | Every possible triplet codes for the same amino acid
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| Which one of the following statements is false? | The nucleolus is a specialized region of a chromosome where tRNA is synthesized
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| Though a gene codes ultimately for all aspects of a protein's structure it codes directly for ___ | A primary structure
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| As proteins are being synthesized, tRNA molecules are constantly being released from the site of amino acid incorporation. What happens to these tRNA molecules? | They pick up another amino acid of the same type that they had before
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| 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 = 3*126
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| An intron is ____ | an RNA sequence that is edited from a transcript before translation
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| 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
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| Active beef insulin is a small protein composed of 51 amino acids. How many nucleotide units does it take to code for this protein? | 153
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| The nucleolus is a specialized region of a chromosome where tRNA is synthesized. | false
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| In base substitution mutations only a single nucleotide of a gene is altered | True
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| Molecules of mRNA are synthesized on the ribosomes from nucleotides brought by tRNA | false
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| Some amino acids are specified by several synonymous codons | true
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| How many possible codes are there for the universal genetic code? | 64
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| In the genetic code how many stop codes are there? | 3
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| tRNA is coiled in a double helix | false
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| mRNA and DNA contain thymine | false
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| mRNA and DNA contain cytosine | true
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| mRNA and DNA contain uracil | false
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| mRNA brings amino acids to the ribosome | false
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| RNA and many enzymes are present in the ribosome | true
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| RNA and polymerase is involved in transcription | true
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| tRNA mRNA and ribosomes are involved in translation | true
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| A missense mutation is one in which the substitution of one nucleotide for another results in a triplet _____ | that codes for a different amino acid
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| The enzyme that put an amino acid on tRNA is called aminoacyl synthetase | true
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| The long chain of amino acids in a protein is called the | Primary sturcture
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| The many folded chain of amino acids in a protein is called or referred to as the ___ | tertiary structure
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| Heat shock proteins are produced to aid in stabilizing the primary structure of a protein | True
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| Chaperones help form the tertiary structure of proteins | False
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| Amino acids can fold ___ ways so a 100 amino acid protein can fold in ___ different ways | 3, 100
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| According to the second law of thermodynamics the folding of proteins follows an energy landscape that seeks the most unstable shape. | False
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| Hydrophobic amino acids nestle themselves in the __ of the __ water | Center, away from
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| Polar amino acids stick __ of the molecule __ the water | outside, into
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| The push and pull of amino acids against each other determines its original protein | true
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| The protein that blocks the transcription of a gene would be made by the ___ | regulatory gene
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| Lactose will block which of the following? | Regulatory gene
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