Identify the base pair combinations that occur between DNA and RNA. The first letter in each pair is a DNA nucleotide, whereas the second letter is an RNA nucleotide. ? G-C ? T-G ? A-T ? U-C ? A-U What is produced after the lactase gene is transcribed by RNA polymerase in the nucleus? ? monosaccharides that can be absorbed into the bloodstream ? a ribosome ? the lactase enzyme ? a molecule of mRNA that codes for the lactase enzyme
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DNA uses the bases adenine (A), guanine (G), cytosine (C), and thymine (T). RNA uses the bases adenine (A), guanine (G), cytosine (C), and uracil (U). Show more…
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The following template DNA sequence is part of the human lactase gene. TAC-CTC-GAC-AGA-ACC-GTA-CAT-CAG-AAA a. Transcribe the DNA strand into RNA. b. Translate the RNA strand into amino acids. c. Bob prepared four containers that had the following contents: A: yeast only + warm water. B: yeast with powdered milk + warm water. C: yeast with powdered milk + crushed Lactaid caplet + warm water. D: yeast with powdered milk + boiled crushed Lactaid caplet + warm water. *The water temperature was not measured. Write a hypothesis stating which container should have the most enzyme activity.
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In humans, the LCT gene encodes the enzyme lactase, which is necessary for metabolizing the disaccharide lactose. Lactase catalyzes the first step in the metabolism of lactose by breaking lactose into the monosaccharides glucose and galactose. Glucose and galactose are then broken down to form ATP by cellular respiration (more on this later in the Carbohydrates Module). To study LCT gene expression, you sequence a 1 kilobase region surrounding the transcription start site. Which of the following would you expect to find? (check all that are correct) an A block and a C block for TFIID to bind the -10 and -35 sequences for TFIID to bind binding sites for ancillary transcription factors to bind AAUAAA for CPSF to bind a TATA box to bind TFIID an operator sequence for lac repressor to bind Many adults become lactose intolerant later in life, which is thought to be due to changes in transcription of the LCT gene. With this hypothesis, you sequence the LCT gene and more of its surrounding genomic sequence in several lactose tolerant and lactose intolerant individuals. You find a number of single basepair mutations only in the lactose intolerant individuals. These mutations are not in the LCT gene, but are located 10-20 kilobases upstream of the gene in the introns of the MCM6 gene (pictured below as bolded nucleotides with slash marks, example- G/A). MCM6 gene LCT gene
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The following template DNA sequence is part of the human lactase gene: TAC-CTC-GAC-AGA-ACC-GTA-CAT-CAG-AAA a. Transcribe the DNA strand into RNA. b. Translate the RNA strand into amino acids.
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