Biology question and answers for November 17, 2023
- Q during DNA replication, the new strand is always 100% DNA.TrueFalse
- Q which of the following does NOT occur when the expression of the operon genes is turned ON?transcription and translation both occurrepressor is released/removed from the operator (ie- repressor is NOT...
- Q What is the role of mRNA?serves as "instructions" read by the ribosome to make proteinit helps to control transcription by binding to the repressorbrings the correct amino acid to the...
- Q Mutation in a gene that specifies a protein always results in:production of non-functional proteinschanging the base sequence of mRNAchanging the amino acid(s) found in the proteinharming the organism/cellchanging the protein's...
- Q Please refer to the passage 86 and image to help you answe. this question. Where does the new protein end up after being released by the ribosome? A. in the...
- Q Which of the following share the same genetic code?a father and childb siblingsc identical twinsd mother and child
- Q At the end of DNA replication, there should be a total of..... A. 8 SINGLE strands of DNA B. 2 DOUBLE stranded DNA helixes C. 5 DOUBLE stranded DNA helixes...
- Q What causes a gene to be passed on to offspring? A. an organism that has a successful trait and survives to pass it to offspring B. if an organisms has...
- Q Match the enzyme to the correct function in the HIV life cycletakes viral DNA and inserts it into the host chromosomecuts the polyprotein into functional proteinsmakes a DNA copy of...
- Q Which type of mutation is exemplified by this statement?A base substitution mutation resulted in conversion of an AAA codon to GAA. AAA codes for lysine (a basic amino acid); GAA...
- Q Most of the processes required for maturation of eukaryotic mRNAs occur cotranscriptionally. Which of the processes below occurs post-transcriptionally (i.e. after RNA synthesis is complete)?a. Cappingb. Poly-adenylationc. Intron removald. mRNA...
- Q In the 1940s, the scientist J. B. S. Haldane linked many human red blood cell disorders with the tropical regions where malaria occurs. Haldane hypothesized that the widespread presence of...
- Q 39. Label each of the following with the correct category of enzyme (constitutiveenzyme) - 10 pointsenzyme or inducible/repressibleAmylase:Helicase:Penicillinase:ATP Synthase:Lipases:DNA Polymerase:Lactose Fermentation:Maltase:
- Q A dominant allele only shows up in the physical when it is homozygous.TrueFalse
- Q All of the following are considered post- transcriptional modifications that occur in the nucleus EXCEPT (A) 5' capping with methylated guanines.(B) the addition of a 3' poly-adenine tail.(C) the excision...
- Q You would like to amplify the following genomic DNA segment using some combination of the four primers (P, Q, R, and S) that you have in your possession. The primers...
- Q What is the catalase test? Coagulase test?What does it mean to be:Catalase +CatalaseCoagulase +Coagulase -When working with an unknown that may beStaphylococcustwo tests help?(but you are not sure), how can...
- Q Suppose that in gerbils, there are two alleles for fur color. Gerbils with a dominant allele are brown, and black fur color is recessive.If 35% of a gerbil population has...
- Q A bacterium can make the amino acid glycine or absorb it from its surroundings. Abiochemist found that glycine binds to a repressor protein and causes the repressorto bind to the...
- Q If lactose is present in the environment of an E. coli cell:The lactose will trigger increased replication of the gene for B-galactosidaseThe lactose will bind to the repressor protein causing...
- Q Which of the following is NOT part of the holoenzyme responsible for replication in bacteria?a. DNA polymerase Ib. Clamp loaderC. DNA polymerase IIId. Sliding clamp
- Q Eukaryotic cells use multiple methods to regulate the amount of each protein in the cell. For each of the following scenarios, choose whether it would be better for the cell...
- Q Using a well-labeled diagram and a narrative, describe the regulation of the lac operon when glucose levels are low and lactose is present. Compare/contrast this with initiation of transcription in...
- Q Which of the following statements are correct with respect to protein synthesis?Check all that apply.The protein chain always stops with valine.Many amino acids can be synthesized using one of two...
- Q What is the main difference between the two main categories of point mutations?Frameshift mutations change the structure of the chromosome, but base pairmutations only change the genetic codeBase pair mutations...
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