BIOL101 Week 5 Quiz complete solutions with all correct answers 2021

BIOL101 Week 5 Quiz complete solutions with all correct answers 2021 DNA REPLICATION Question 1 (0 points) If a strand of DNA of sequence 5’-CCGAATGGGCAT-3’ is replicated, which of the following accurately repr ...

BIOL101 Week 5 Quiz complete solutions with all correct answers 2021 DNA REPLICATION Question 1 (0 points) If a strand of DNA of sequence 5’-CCGAATGGGCAT-3’ is replicated, which of the following accurately represents the newly synthesized DNA strand? Question 1 options: 5 -’CCGAATGGGCAT - 3' 3’-GGCTTACCCGTA-5’ 3’-CCGAATGGGCAT-5’ 5’-GGCTTACCCGTA-3’ Save ________________________________________ STRUCTURE OF DNA Question 2 (5 points) The nitrogenous base thymine is what type of base? Question 2 options: monoamine purine pyrimidine amino acid Save Question 3 (5 points) Which of the following is not a component of nucleotides, the building blocks of DNA? Question 3 options: deoxyglucose inorganic phosphate nitrogenous base deoxyribose Save Question 4 (0 points) What molecule connects the sugars in a strand of DNA? Question 4 options: ribose phosphate deoxyribose hydrogen Save Question 5 (5 points) What proteins are crucial for creating and maintaining DNA replication forks? Choose the best explanation. Question 5 options: Helicase creates the replication fork; primase keeps the single strands from closing shut. Helicase creates the replication fork; single-strand binding proteins keep the single strands from reuniting. Ligase creates the replication fork; DNA polymerase II keeps the single strands from reuniting. Helicase creates the replication fork; ligase keeps the single strands from closing shut. TRANSCRIPTION Question 6 (5 points) Transcription is the transfer of genetic information from _______. Question 6 options: mRNA to DNA tRNA to mRNA DNA to mRNA mRNA to tRNA Save ________________________________________ DNA POLYMERASE Question 7 (5 points) Which enzyme is required during transcription? Question 7 options: restriction enzymes DNA polymerase RNA polymerase RNAase Save ________________________________________ HOW GENES ARE REGULATED Question 8 (5 points) Control of gene expression in eukaryotic cells occurs at which level(s)? Question 8 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 9 (5 points) In the process of translation, Question 9 options: a strand of mRNA is formed with nucleotide sequences complementary to those of DNA nucleotide sequences of tRNA are established rRNA is synthesized with sequences complementary to those of tRNA a polypeptide is formed as dictated by the nucleotide sequence in mRNA Save ________________________________________ Question 10 (5 points) Use the genetic code to determine which amino acids the following mRNA sequence code for: AAA GCG GAA Question 10 options: Trp, Phe, Lys Lys, Ala, Glu Lys, Phe, Trp Glu, Ala, Lys Question 11 (5 points) If a DNA strand with the sequence GGCATGCCTATGCGA is transcribed, which of the following accurately represents the newly synthesized mRNA strand? Question 11 options: CCGTACGGATACGCT CCGUACGGAUACGCU CCGAUCGGUAUCGCA GGCATGCCTATGCGA Save ________________________________________ Question 12 (0 points) An individual has a mutation in the gene that codes for hemoglobin. This results in sickle cell disease. Choose the correct explanation for how this mutation affects the individual's traits. Question 12 options: 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 hemoglobin protein which makes it non-functional. The resulting trait is sickle cell disease. 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 hemoglobin protein which makes it non-functional. The resulting trait is sickle cell disease. 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 hemoglobin protein which makes it non-functional. The resulting trait is sickle cell disease. 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 hemoglobin protein which makes it non-functional. The resulting trait is sickle cell disease Save ________________________________________ RNA METABOLISM Question 13 (5 points) Where are the RNA components of a eukaryotic cell synthesized? Question 13 options: cell membrane nucleus cytoplasm endoplasmic reticulum Save ________________________________________ GENE EXPRESSION Question 14 (5 points) Which of the following applies best to post-translational control? Question 14 options: regulation of gene expression after transcription regulation of gene expression after translation control of epigenetic activation period between transcription and translation Save ________________________________________ Question 15 (5 points) What is the role of Agrobacterium tumefaciens in the production of transgenic plants? Question 15 options: Tomatoes get increased shelf life when exposed to the beneficial bacteria Agrobacterium tumefaciens. Transgenic plants are all designed to be resistant to the disease causing bacteria Agrobacterium tumefaciens. Agrobacterium tumefaciens is a bacteria that is used to move desired genes into the plant cells. Agrobacterium tumefaciens is a bacteria that produces Bt toxins that kill small mammals. Question 16 (5 points) What is a genetically modified organism (GMO)? Question 16 options: A plant with certain genes added that mimic naturally occurring genes for that plant An organism with an artificially altered genome An organism made of proteins from two different organisms An animal produced by artificial selection Save Question 17 (5 points) In the reproductive cloning of an animal, what cell type is used as the source of the genome of the cloned animal? Question 17 options: A sperm cell An egg cell Any gamete cell A somatic (non-gamete)) cell Save Question 18 (5 points) Which of the options listed below can serve to carry a gene from one organism into a bacteria cell? Question 18 options: A plasmid An electrophoresis gel A restriction enzyme Polymerase chain reaction Save ________________________________________ Question 19 (5 points) Which of the following statements about the FlavrSavr tomato are correct? Select all that apply. Question 19 options: The FlavrSavr tomato was the first genetically modified crop to be approved for human consumption in the U. S. The FlavrSavr tomato was genetically engineered to slow down the rotting process for a longer shelf life. The FlavrSavr tomato has an inserted bacterial gene in its genome that provides herbicide resistance. The FlavrSavr tomato is no longer on the market. Save ________________________________________ Question 20 (5 points) What is one way that scientists use metagenomics? Question 20 options: Study evolutionary relationships Forensic analysis Evaluate the effectiveness of drugs based on individual’s genomic sequence Study the genomes of multiple species in the same environmental niche