BIO 148 Exam 2 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES

BIO 148 Exam 2 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES The change in the nucleotide sequence of the PGC gene caused a change in the amino acid sequence that was produced after translation. The altered pepsinogen molecule likely has a different ___________ compared to the original pepsinogen molecule. a. Shape b. function c. secondary structure d. terry structure e. all of the above are correct - Answer- e. all of the above are correct Within the cell, you would expect to find RNA polymerase in the _____. Enzymes involved with splicing would be found in the ______. a. cytoplasm; nucleus b. cytoplasm; cytoplasm c. nucleus; nucleus d. nucleus; cytoplasm - Answer- c. nucleus; nucleus Pepsinogen is a protein encoded by the PGC gene. Pepsinogen is found in the human stomach to aid digestion, but is not found in other cell types. Which of the following would you NOT expect to find in human skin cells? a.PGC switch activators b.The PGC promoter c.PGC gene sequences d.PGC switches of the above would be absent from skin cells. - Answer- A. PGC Switch activators d. all cells in their body - Answer- Suppose an individual is born with a slightly different nucleotide sequence in their PGC gene. This different gene sequence can be expected to be found in... the cells lining their stomach the cells of organs related to the digestive system. their sex cells (egg or sperm) cells in their body. Which of the following about switch activators is true? a. They bind to 3' poly A tails b. They regulate the number of times a RNA molecule is translated c. They are essential for proper splicing d. They are proteins that bind to DNA sequences e. They add 5' caps of RNA molecules. - Answer- d. They are proteins that bind to DNA sequences. Which process synthesizes RNA using information in DNA? A. DNA replication b. Transcription c.RNA processing d. translation e. splicing g - Answer- b. transcription In eukaryote cells, mRNA is produced in the ____ and is translated in the ____. a. nucleus, nucleus b. cytoplasm, cytoplasm c. nucleus, cytoplasm d. cytoplasm, nucleus e. ribosome, tRNA - Answer- c. nucleus, cytoplasm which of the following is a step in the process of gene expression in eukaryote? a. mitosis b. RNA processing c. replication d. evolution e. all of the above - Answer- d. RNA processing Genes are ______. a. portions of mRNAs that code for a protein b. portions of primary transcripts that code for a protein c. portions of primary transcripts that code for a visible trait. d. portions of chromosomes that code for a protein . e. portions of mRNAs that code for a visible trait. - Answer- d. portions of chromosomes that code for a protein. Eukaryotic genes contain____. a. a transcribed region b. a promoter c. a gene switch activator d. a and b e. a, b, and c - Answer- d. a and b Gene A is expressed in only liver cells whereas Gene B is expressed in only skin cells because___. a. only liver cells have gene A and only skin cells have gene B b. Gene A only has a liver switch and Gene B only has a skin switch. c. only liver cells have liver switches and only skin cells have skin switches d. Gene A has introns whereas Gene B does not e. Gene B has introns whereas Gene A does not. - Answer- B. Gene A only has a liver switch and Gene B only has a skin switch The DNA sequence from two cells is analyzed and found to contain the same genes but different alleles of those gene. These two cells could be____. a. Kidney cells and white blood cells from a single individual. b. kidney cells and white blood cells from two different individuals of the same species. c. white blood cells from two individuals from different species. d. kidney cells from two individuals from different species. e. c and d - Answer- B. Kidney cells and white blood cells from two different individuals of the same species. RNA polymerase must first bind to the ____ of a gene before it can begin transcription. a. promoter b. gene switch c. intron d. exon - Answer- a. promoter A gene is expressed in liver, kidney, and skin cells of an animal. A mutation that inactivates ____ will prevent expression of this gene in liver but not in kidney or skin. a. the liver gene switch b. the liver gene switch activator c. the gene's promoter d. a and b e. a and c. - Answer- d. a and b A gene informally expressed in muscle cells and nerve cells, but not in any other cell type in an animal.Which of the following will be a DNA sequence associated with this gene in SKIN cells? a. a muscle cell gene switch b. a nerve cell gene switch c. a promoter d. a, b, and c e. none of the above - Answer- d. a, b, and c Hemoglobin, the oxygen carrying protein in your red blood cells, is composed of four proteins, two alpha globing proteins and two beta globing proteins. Which of the following types of protein structure does hemoglobin have? a. primary b. secondary c. tertiary d. quaternary e. all of the above - Answer- e. all of the above