Biology > Quiz > American Military University SCIN 130 Week 5 Quiz. All 31 QnA 100% Rated. (All)

American Military University SCIN 130 Week 5 Quiz. All 31 QnA 100% Rated.

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Part 1 of 7 - Chapter 9 27.0 Points Question 1 of 31 3.0 Points What is the central dogma of genetic information?  A. DNA produces proteins directly  B. DNA encodes RNA, which in turn enc... odes protein  C. RNA stores our genome for safety  D. proteins code for DNA and RNA Feedback: Great job. Question 2 of 31 3.0 Points How is it possible that each daughter cell during cell replication receives an identical copy of the DNA?  A. DNA is replicated following mitosis or meiosis, so is transferred after the new cells are formed B. DNA is not identical in every cell, so all daughter cells have different copies  C. DNA is replicated individually in each new cell after meiosis and mitosis  D. DNA is replicated during the synthesis phase of the cell cycle, prior to mitosis or meiosis Feedback: DNA must be replicated prior to the new cells being created, so each can receive an exact copy. Read more on DNA replication in Chapter 9 Question 3 of 31 3.0 Points The steps from DNA to mRNA are initiation, elongation and what?  A. commencement  B. termination C. origin  D. template Feedback: Great job. Question 4 of 31 3.0 Points Why does one strand of DNA replicate as a continuous strand, and the other in fragments?  A. they are anti-parallel, and DNA polymerase can synthesize in either direction  B. they are parallel, and DNA polymerase can synthesize in either direction  C. they are anti-parallel, and DNA polymerase can only synthesize from 5’ to 3’  D. they are parallel, and DNA polymerase can synthesize from 5’ to 3’ Feedback: Great job. Question 5 of 31 3.0 PointsWhich portion of the primary RNA transcript is removed because it does not encode a functional protein?  A. intron  B. promoter  C. spliced  D. exon Feedback: Great job. Question 6 of 31 3.0 Points DNA is said to be in what shape?  A. a triple helix B. a triple twist  C. a double corkscrew  D. a double helix Feedback: Great job. Question 7 of 31 3.0 Points How is it possible that multiple sites of DNA replication can exist inside the cell?  A. there are not multiple sites of replication  B. there are multiple origins of replication  C. genes are replicated quickly, so there are usually >4 of one gene at a time D. during cytokinesis, DNA is replicated at twice the rate Feedback: Great job. Question 8 of 31 3.0 Points Which two parts of the nucleotide covalently bond to each other to form the backbone of DNA?  A. sugar and nitrogen  B. phosphate and nitrogen  C. sugar and phosphate  D. phosphate and oxygen Feedback: Great job. Question 9 of 31 3.0 Points What is the most common method for repairing nucleotide errors in DNA? A. uracil base replacement  B. mismatch repair  C. nucleotide excision repair  D. thymine dimers Feedback: DNA polymerase can sometimes make a mistake, most commonly due to a mismatch, so it is important that incorrect bases are removed and replaced. Read more about DNA repair in Chapter 9. Part 2 of 7 - Chapter 10 27.0 Points Question 10 of 31 3.0 Points What is a plasmid with foreign DNA inserted referred to as?  A. recombinant DNA  B. foreign DNA C. host DNA  D. restriction DNA Feedback: Foreign DNA is combined with a plasmid to produce a recombined DNA structure, that is used for modification. Review cloning and genetic engineering in Chapter 10. Question 11 of 31 3.0 Points What do the different bands in the same lane of an agarose gel represent?  A. different organisms  B. different size pieces  C. links of protein  D. similar genetic make upFeedback: In one lane of an agarose gel, there are different sized pieces of DNA from one sample. Review Chapter 10. Question 12 of 31 3.0 Points What is an example of a transgenic organism?  A. an heirloom tomato variety  B. a traditional breeding project where red and green apples are crossed  C. mating of a horse and a donkey to produce a mule  D. a tomato with a gene for freezing tolerance from fish Feedback: Transgenic is the result of foreign DNA that is a different species being transferred by recombinant DNA. Review cloning and genetic engineering in Chapter 10. Question 13 of 31 3.0 Points The introduction of a non-mutated gene at a random location to cure a disease by replacing a protein is called what? A. transgenic organism  B. gene therapy  C. recombinant DNA  D. reverse genetics Feedback: Great job. Question 14 of 31 3.0 Points Gel electrophoresis separates charged molecules on the basis of what?  A. shape and color  B. contents and charge C. temperature and shape  D. size and charge Feedback: Great job. Question 15 of 31 3.0 Points What is a technique used to rapidly increase the number of copies of specific regions of DNA?  A. DNA precipitation  B. Gel electrophoresis  C. Cell lysing  D. Polymerase chain reaction Feedback: Great job. Question 16 of 31 3.0 PointsWhy was Dolly a Finn-Dorset and not a Scottish Blackface?  A. the surrogate ewe was a Finn-Dorset  B. enucleation occurred with a Scottish Blackface egg  C. the nucleus came from a Finn-Dorset  D. the cytoplasmic donor was from a Scottish Blackface Feedback: The source of DNA is what dictates the final type of the animal. Review cloning and genetic engineering in Chapter 10. Question 17 of 31 3.0 Points What compound carries a gene from one organism into a bacterial cell?  A. an enzyme B. a plasmid  C. a promoter  D. a nucleotide Feedback: Great job. Question 18 of 31 3.0 Points What is a basic definition of cloning?  A. increasing the number of plants  B. creation of a perfect replica  C. increasing the life expectancy of animals D. creation of a similar copy Feedback: Great job. Part 3 of 7 - Lecture Material 9.0 Points Question 19 of 31 3.0 Points Why are some viruses species- or tissue-specific?  A. The RNA must first be added to the nucleus of the host, then added to the cell  B. The inner DNA must be compatible with the host DNA.  C. The proteins in its outer shell must be able to interact with host cellular proteins.  D. The inner RNA must be compatible with the host RNA Feedback: Great job. Question 20 of 31 3.0 Points What are some of the oldest known organisms on Earth? A. plant fungi  B. arahae bacteria  C. bacteriophages  D. protozoa Feedback: These bacteria are in a separate domain than most other bacteria, and can survive extreme conditions. Review Biodiversity: Archaea in the Weekly Lecture Lesson. Question 21 of 31 3.0 Points Which is a good definition of genetic engineering?  A. DNA that contains genes from more than one source  B. an organism that has another species’ DNA inserted into its genome using genetictechniques  C. techniques of molecular biology that involves manipulation of genes  D. A process to determine the genetic makeup of an individual at a particular location in an individual’s DNA Feedback: Genetic engineering is a broad term that simply involves manipulation; it is used for other techniques. Review Biotechnology in the Weekly Lecture Lesson. Part 4 of 7 - Part 3: Lab Lecture Material 9.0 Points Question 22 of 31 3.0 Points A digital thermometer is calibrated to be accurate within +/- 0.1 ˚C. Two temperature measurements are then taken that show the temperature is 24.9 ˚C and 25.1 ˚C? Do these measurements agree?  A. Yes  B. No C. Not enough information is given Feedback: Yes, the measurements agree. Based on the accuracy of the thermometer, the 24.9 ˚C measurement indicates the temperature can be 24.8 ˚C and 25.0 ˚C and the 25.1 ˚C measurement indicates the temperature can be 25.0 ˚C and 25.2 ˚C. The two measurements together tell us that the temperature is 25.0 ˚C. Question 23 of 31 3.0 Points What does accuracy refer to when discussing data measurement?  A. How close a measured value is to previous measured values  B. Whether or not a measurement was performed correctly  C. How close a measured value is from a standard or established value  D. The number of significant digits in the final measurement Feedback: Correct! Accuracy tells us how close the value that we’ve measured is to the value that we know it should be. Question 24 of 31 3.0 Points What are qualitative data measurements? A. Measurements of numerical variables and are displayed as numerical values  B. Measurements that are appropriate for any experiment  C. Measurements of categorical variables and can be displayed as types or descriptions  D. Measurements that are appropriate for any type of variable Feedback: Qualitative data measurements are measurements of categorical variables – they provide data that answers questions like “what type?” Part 5 of 7 - Lab Material 15.0 Points Question 25 of 31 3.0 Points Which is the largest virus overall, when comparing relative sizes?  A. Zika B. Ebola  C. Influenza  D. Rabies  E. Adenovirus Feedback: Great. Question 26 of 31 3.0 Points Which was the first virus to be described?  A. Ebola  B. HIV C. T7  D. TMV  E. Adenovirus Feedback: Great. Question 27 of 31 3.0 Points What is the relative length of the tobacco mosaic virus?  A. 100 nm  B. 25 nm  C. 250 nm D. 1000 nm Feedback: Great. Question 28 of 31 3.0 Points What is a virus that is transmitted from a vertebrate animal to humans?  A. vector  B. parasite  C. zoonic  D. host Feedback: Great. Question 29 of 31 3.0 Points Why is Zika of concern to pregnant women? A. it can cause Down’s Syndrome  B. it can cause spina bifida  C. It can cause clubfoot  D. it can cause microcephaly Feedback: Great. Part 6 of 7 - Lab Essay 5.0 Points Question 30 of 31 5.0 Points In a few sentences, what was the overall purpose of the lab for this week? You should include 1- 2 sentences on the methods and then the overall reason. The purpose of the lab this week was to identify the different types of viruses based on their unique characteristics. The lab showed how the different structures of viruses could be compared which assists in characterizing them. Part 7 of 7 - Lab Upload 8.0 Points Question 31 of 31 8.0 Points Please upload your completed Lab Packet for this week. Make sure your name is on the top in the space provided. [Show More]

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