When the enzyme telomerase was first discovered, some peoplethought it might be “the fountain of youth” because it could immortalize cells. Why do you think this may not be the case?
Q: Which of the following is NOT true of the telomerase enzyme? Question 4 options: A) Its adds a…
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Q: Q5
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Q: Do bacteria require telomerase? Explain why or why not
A: No, Bacteria do not require telomerase.
Q: Telomerase is a very important enzyme for the control of both cancer and aging. In 5 sentences,…
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Q: why does DNA synthesis only proceed in the 5' to 3' direction?
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A: DNA is synthesized only in 5'-to-3' direction.
When the enzyme telomerase was first discovered, some people
thought it might be “the fountain of youth” because it could immortalize cells. Why do you think this may not be the case?
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- X-rays strike a chromosome in a living cell and ultimately cause the cell to die. Did the X-rays produce a mutation? Explain why or why not.Telomerase is a very important enzyme for the control of both cancer and aging. In 5 sentences, explain what telomerase is and why it is important in both cancer and aging.What might best explain why the incidence of cancer increases as people age? Select one: a. mutations accumulate as people age b. cell division increases as people age c. protein synthesis increases as people age d. telomerase activity increases as people age e. ATP production increases as people age
- Which of the following statements can be said about the enzyme telomerase? Select all the answers that apply. It removes RNA primers. It is highly expressed in cancer cells. It extends the length of telomeres. It exhibits reverse transcriptase activity. It shortens the ends of chromosomes.What do you mean by bacteriophage?An enzyme is needed for the Krebs Cycle. It will be made following the directions contained in a gene of one of the __29__ found in the __30__ of the cell. A portion of the double strand of __31__ splits apart between the weak__32__bonds holding the bases together. This portion contains the code for building the enzyme. The code message begins with a triplet call a _33__ , followed by the code, then signals the end with a triplet called the _34__. The DNA is composed of groups of three molecules called __35__ . They are made up of ribose __36__, a __37___ for additional support, and a nitrogenous __38___. These match up with complementary ones on the opposite strand of DNA. A cytosine will pair up with __39___. An RNA uracil will pair up with __40___ on the DNA. When they line up and join, a __41__ RNA strand is formed. This process of copying the code into RNA is called __42__. The RNA will move out to the cytoplasm, to an organelle called a __43__. There, __44___ RNA…
- Below is a list of functions related to protein synthesis. Place the number for the function in the blank above its corresponding structure. 1. Copies the genetic code from DNA and carries it to the ribosomes 2. Splits DNA into two strands and transcribes MRNA from the antisense strand 3. Carries amino acids to the ribosome 4. Area on DNA antisense strand that RNA polymerase binds to begin transcription Promoter MRNA RNA TRNA region polymeraseWhich of the following statements about the processes of the central dogma is/are incorrect? I. Replication occurs only once during the life cycle of a cell. II. The entire sequence of a DNA molecule carries instructions for the synthesis of proteins and nucleic acids. III. The products of transcription all eventually undergo translation. IV. Transcription and replication both involve the use of RNA molecules. V. The translation of the genetic code is directly based on the sequence of the template DNA strand. O , I, and V O II, II, and V O l and IV O II, II, and IV O Only l is incorrectResearchers can isolate a sample of cells, such as skin fibroblasts, and grow them in the laboratory. This procedure is called a cell culture. A cell culture can be exposed to a sample of DNA. If the cells are treated with agents that make their membranes permeable to DNA, the cells may take up the DNA and incorporate it into their chromosomes. This process is called transformation or transfection. Scientists have transformed human skin fibroblasts with methylated DNA and then allowed the fibroblasts to divide for several cellular generations. The DNA in the daughter cells was then isolated, and the segment that corresponded to the transformed DNA was examined. This DNA segment in the daughter cells was also found to be methylated. However, if the original skin fibroblasts were transformed with unmethylated DNA, the DNA found in the daughter cells was also unmethylated. With regard to the transformed DNA, do fibroblasts perform de novo methylation, maintenance methylation, or both?…
- Why is it important for DNA to be copied before a cell undergoes mitosis?Proteins are not suitable to the genetic molecules within cells because they? a) are large organic compounds b) are composed of building blocks called amino acids c) do not replicate themselves d) catalyze biochemical reactionsBlack men are more likely to get prostate cancer than other men. You are working on a prostate cancer project. You want to isolate cancer cells from a diseased prostate and culture the cells. Akilah, your lab partner uses a procedure to isolate the prostate cancer cells. You decide you want to culture the cells for various types of biological analysis. Write up the procedure used to culture the prostate cancer cells You froze some of the prostate cancer cells for future experiments. How did you freeze the cells?Now you and your team decided to analyze the genetic material. Your lab mate isolated the DNA from the prostate cancer cells. You isolated the RNA from the prostate cancer cells. Write up the procedure you used to isolate the RNA Your lab mate does Northern blotting to visualize the RNA expression. You are interested in two genes that are overexpressed in prostate cancer cells. Write up or illustrate the procedure you used to run the Northern blot in your own words.Alex,…