BIO 103 QUESTIONS AND ANSWERS ALL CORRECT ANDSWERS GRADED A

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BIO 103 QUESTIONS AND ANSWERS ALL CORRECT ANDSWERS GRADED A If a strand of DNA of sequence 5’-GGTGACACAATGTTC-3’ is replicated, which of the following accurately represents the newly synthesized ... DNA strand? Question 1 options: 3’-CCACTGTGTTACAAG-5’ 3’-TTATCGCGCCATAAG-5’ 5’-TTATCGCGCCATAAG-3’ 5 -’CCACTGTGTTACAAG - 3' Save ________________________________________ STRUCTURE OF DNA Question 2 (5 points) What molecule connects the sugars in a strand of DNA? Question 2 options: ribose phosphate deoxyribose hydrogen Save Question 3 (5 points) The nitrogenous base thymine is what type of base? Question 3 options: monoamine purine pyrimidine amino acid Question 4 (5 points) What type of bond keeps each individual DNA strand together? Question 4 options: covalent bonds ionic bonds hydrogen bonds electrostatic bonds Save ________________________________________ TRANSCRIPTION Question 5 (5 points) Transcription is the transfer of genetic information from _______. Question 5 options: DNA to RNA tRNA to mRNA DNA to mRNA mRNA to tRNA Save ________________________________________ DNA POLYMERASE Question 6 (5 points) What is the part of the gene called where the DNA polymerase first binds during transcription? Question 6 options: promoter repressor operon inducer HOW GENES ARE REGULATED Question 7 (5 points) Control of gene expression in eukaryotic cells occurs at which level(s)? Question 7 options: only the transcriptional level epigenetic and transcriptional levels epigenetic, transcriptional, and translational levels epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels Save ________________________________________ TRANSLATION Question 8 (5 points) In the process of translation, the amino acids are arranged to form specific proteins because they are attached to: Question 8 options: rRNA tRNA mRNA DNA Save ________________________________________ Question 9 (5 points) Use the genetic code to determine which amino acids the following mRNA sequence code for: GAA GCG AAA Question 9 options: Glu, Ala, Lys Lys, Ala, Glu Trp, Phe, Lys Lys, Phe, Trp Save Previous PageNext Page Question 10 (5 points) If a DNA strand with the sequence AATAGCGCGGTATTC is transcribed, which of the following accurately represents the newly synthesized mRNA strand? Question 10 options: AATAGCGCGGTATTC UUAUCGCGCCAUAAG TTATCGCGCCATAAG UUAUGCGCGGAUAAC Save ________________________________________ Question 11 (5 points) An individual has a mutation in the gene that codes for the pigment melanin that results in white skin and hair. Choose the correct explanation for how this mutation affects this individual's traits. Question 11 options: The error in the DNA sequence results in an error in the mRNA molecule during transcription, the error in the mRNA molecule results in an incorrect amino acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. The error in the mRNA sequence results in an error in the DNA molecule during transcription, the error in the DNA molecule results in an incorrect amino acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. The error in the DNA sequence results in an error in the mRNA molecule during transcription, the error in the mRNA molecule results in an incorrect nucleic acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. The error in the mRNA sequence results in an error in the DNA molecule during transcription, the error in the DNA molecule results in an incorrect nucleic acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. Save ________________________________________ RNA METABOLISM Question 12 (5 points) What is the name given to the portions of eukaryotic mRNA sequence that are removed during RNA processing? Question 12 options: exons caps poly - A tails introns GENE EXPRESSION Question 13 (5 points) Control of gene expression in prokaryotic cells occurs at which level(s)? Question 13 options: primarily at the transcriptional level epigenetic and transcriptional levels only at the post-translational levels epigenetic, transcriptional, post-transcriptional, translational, and post-translational Save ________________________________________ DNA PACKAGING Question 14 (5 points) Which of the following statements is NOT true regarding DNA packaging in a eukaryotic cell? Question 14 options: DNA is wrapped around proteins known as histones to form structures called nucleosomes DNA is wrapped tightly around a histone core DNA is twisted in what is known as supercoiling without histones Nucleosomes containing DNA are linked to each other by a short strand of DNA that is free of histones. Save ________________________________________ Question 15 (5 points) What is the role of Agrobacterium tumefaciens in the production of transgenic plants? Question 15 options: Genes from Agrobacterium tumefaciens are inserted into plant DNA to give the plant different desired traits. Transgenic plants have been given resistance to the pest Agrobacterium tumefaciens. Agrobacterium tumefaciens is used as a vector to move genes into plant cells. Plant genes are incorporated into the genome of Agrobacterium tumefaciens Question 16 (5 points) Which of the options listed below can serve to carry a gene from one organism into a bacteria cell? Question 16 options: A plasmid An electrophoresis gel A restriction enzyme Polymerase chain reaction Save Question 17 (5 points) What kind of diseases are studied using genome-wide association studies? Question 17 options: Viral diseases Single-gene inherited diseases Diseases caused by multiple genes Diseases caused by environmental factors. Save Question 18 (5 points) Which of the applications of genomics listed below can be used in agriculture? Question 18 options: Generate new, resilient hybrid strains Improve disease resistance Improve crop production All of the above Question 19 (5 points) Which of the following statements about Bacillus thuringiensis (Bt) corn are correct? Select all that apply. Question 19 options: Bt corn has increased nutritional value and a longer shelf life compared to corn that has not been genetically modified. Bt corn is only used for animal feed in the United States Bt corn has an inserted bacterial gene in its genome. Bt corn is approved for human consumption. Save ________________________________________ Question 20 (5 points) For what purpose is mitochondrial genomics used? Question 20 options: Forensic analysis Evaluate the effectiveness of drugs based on individual’s genomic sequence Study evolutionary relationships Study the genomes of multiple species in the same environmental niche [Show More]

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