How do cells ensure that the transcription activating functions of E2F transcription factors are limited to...
How do cells ensure that the transcription activating functions of E2F transcription factors are limited to a narrow window of in the cell cycle? What might occur if E2F function were allowed to continue throughout the cell cycle?
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How do cells ensure that the transcription activating functions
of E2F transcription factors are limited to...
QUESTION 1 Hox genes are genes that code for transcription factors. What do transcription factors do?...
QUESTION 1 Hox genes are genes that code for transcription factors. What do transcription factors do? A. Bind to DNA to make it available for transcription B. Make up specific body parts C. Activate ribosomes QUESTION 2 Genes that need to be turned on at the same time (for example, the genes that encode the proteins that build toes) will all respond to the same transcription factor. A. True B. False QUESTION 3 Hox genes are sometimes called "master switches"....
In eukaryotic cells, there are specific transcription factors (activators) that regulate gene expression. Describe the organization...
In eukaryotic cells, there are specific transcription factors (activators) that regulate gene expression. Describe the organization of eukaryotic genes (i.e. promoters/enhancers) and how transcription factors are able to control gene expression and enzyme activity. a) Throughout the course we discussed the enzyme lactase and how it is differently regulated (and therefore expressed) in different human populations. Describe how this gene is differently expressed in different populations and when this/these change(s) are predicted to have taken place. b) Differential gene expression...
Last week we discussed the role of general transcription factors in forming the transcription initiation complex...
Last week we discussed the role of general transcription factors in forming the transcription initiation complex in eukaryotes. Next week we will look more closely at the regulation of gene expression and the role played by specific transcription factors. Prokaryotes and eukaryotes utilize very different mechanisms for determining which genes are turned on and off and when. In lieu of the prokaryotic operon model, eukaryotes employ a combinatorics approach utilizing both general and specific transcription factors. For this week’s forum,...
6.) Mitogens are (b) transcription factors important for cyclin production (c) kinases that cause cells to...
6.) Mitogens are (b) transcription factors important for cyclin production (c) kinases that cause cells to grow in size (a) extracellular signals that stimulate cell division. d) produced by mitotic cells to keep nearby neighboring cells from dividing 7.) Which of the following cyclins is most active during mitosis? (a) cyclin A (b) cyclin B (c) cyclin C (d) cyclin D 8) Which molecule inactivate itotic cyclin-CDK complexes using phosphorylation? (a) Cdc25 (b) Cdc6 (c) Weel (d) Helicase 9.) What...
If every cell in the body gets the same DNA, how do the cells of an...
If every cell in the body gets the same DNA, how do the cells of an embryo make different structures and take on different roles? (Select all that apply.) A. Different transcription factors are active in different cells. B. Different transcription factors are encoded in the DNA. C. Genes are spliced differently in different cells. D. Translation is regulated so that different cells may make more of certain proteins. E. Some cells lack ribosomes while others use them. F. Cells...
How do transcription factors affect gene expression? a.) They are molecules that can turn genes on...
How do transcription factors affect gene expression? a.) They are molecules that can turn genes on or off. b.) They are mRNAs that contain extra information that is not part of the DNA genome. c.)They modify the chromosome structure to create mutations. d.) They are signals that tell cells whether to divide or not.
CHAPTER 12 THE CELL CYCLE Study Questions The Key Roles of Cell Division 1. Why do...
CHAPTER 12 THE CELL CYCLE Study Questions The Key Roles of Cell Division 1. Why do cells divide? 2. What are the major events of eukaryotic cell division that enable the genome of one cell to be passed on to two daughter cells? 3. How do chromosomal numbers change throughout the human life cycle? The Mitotic Cell Cycle 4. What are the phases of the cell cycle? What is the sequence of events that occurs during each phase? 5. What...
15.Mycoplasma cells don't have cell wall. What is the shape of these cells and how do...
15.Mycoplasma cells don't have cell wall. What is the shape of these cells and how do these reinforce their cell membrane? 16.What are some of the functions of the bacterial plasma membrane? 17.What is meant by active transport of a solute?
answer this pls asap PART 1: How Long Do Cells Spend in Each stage of Mitosis?...
answer this pls asap
PART 1: How Long Do Cells Spend in Each stage of Mitosis? In this activity, you will be presented with cells from the tip of an onion root. You will classify each cell based on what phase it is in. At the end you will count up the cells found in each phase and use those numbers to predict how much time a dividing cell spends in each phase. You can base your calculation on a...
How are the functions of stomata and guard cells related and what would be the consequence...
How are the functions of stomata and guard cells related and what would be the consequence if those cells did not function property? Select one: a. Guard cells are responsible for opening and closing the stomata, and if the stomata did not function then gas exchange and transpiration will not occur through these cells b. Guard cells are responsible for opening and closing of the stomata, and if the guard cells did not function then gas exchange and transpiration will...
6.) Mitogens are (b) transcription factors important for cyclin production (c) kinases that cause cells to grow in size (a) extracellular signals that stimulate cell division. d) produced by mitotic cells to keep nearby neighboring cells from dividing 7.) Which of the following cyclins is most active during mitosis? (a) cyclin A (b) cyclin B (c) cyclin C (d) cyclin D 8) Which molecule inactivate itotic cyclin-CDK complexes using phosphorylation? (a) Cdc25 (b) Cdc6 (c) Weel (d) Helicase 9.) What...
CHAPTER 12 THE CELL CYCLE Study Questions The Key Roles of Cell Division 1. Why do cells divide? 2. What are the major events of eukaryotic cell division that enable the genome of one cell to be passed on to two daughter cells? 3. How do chromosomal numbers change throughout the human life cycle? The Mitotic Cell Cycle 4. What are the phases of the cell cycle? What is the sequence of events that occurs during each phase? 5. What...
15.Mycoplasma cells don't have cell wall. What is the shape of these cells and how do these reinforce their cell membrane? 16.What are some of the functions of the bacterial plasma membrane? 17.What is meant by active transport of a solute?
answer this pls asap
PART 1: How Long Do Cells Spend in Each stage of Mitosis? In this activity, you will be presented with cells from the tip of an onion root. You will classify each cell based on what phase it is in. At the end you will count up the cells found in each phase and use those numbers to predict how much time a dividing cell spends in each phase. You can base your calculation on a...
How are the functions of stomata and guard cells related and what would be the consequence if those cells did not function property? Select one: a. Guard cells are responsible for opening and closing the stomata, and if the stomata did not function then gas exchange and transpiration will not occur through these cells b. Guard cells are responsible for opening and closing of the stomata, and if the guard cells did not function then gas exchange and transpiration will...
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