1.explain the difference between positive and negative feedback control. 2.define/describe “operon.” 3.diagram and explain the function...
1.explain the difference between positive and negative feedback control.
2.define/describe “operon.”
3.diagram and explain the function of the lac operon. Know what happens in the “on” and “off” states, and how the cell switches between them.
Homework Answers
Answer 1. In the positive feedback control, the result or the output amplifies the stimulus, whereas, the reverse happens in the negative feedback control i.e. the result or the output stops the stimulus. Oxytocin which is known as the birth hormone works on the positive feedback mechanism.
Answer 2. Operon is a segment of DNA that does genetic expression and helps in the protein synthesis. These proteins can function as enzymes and helps in catalysing a substrate to provide energy to an organism, as it happens in the Lac operon.
Answer 3. 
Add Answer to:
1.explain the difference between positive and negative feedback
control.
2.define/describe “operon.”
3.diagram and explain the function...
1. Describe in detail how both positive and negative regulation control expression of the lac operon...
1. Describe in detail how both positive and negative regulation control expression of the lac operon in bacteria. In doing this, also convey understanding of how and why expression of this operon is controlled two ways (positive and negative). Also answer, what are the energetic benefits to the cell of operon regulation? 2. What is horizontal gene transfer? Describe in detail the three mechanisms of horizontal gene transfer. What are the evolutionary advantages and costs of horizontal gene transfer. I...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c)...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c) Positive inducible d) Negative inducible 2) An activator regulatory protein… a) Is involved in negative regulatory control b) Is a cis acting regulatory element c) Recruits RNA polymerase to the promoter d) Prevents RNA polymerase from binding the promoter 3) For the lac operon, the presence of the substrate (lactose) activates the repressor. True or False? a) true b) false 4) cAMP… a) Activates...
for 1-5 define those The Lac operon is an inducible set of genes found in bacteria...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
1. (1 pt) If a gene is repressible and under positive control, A. Is the regulatory...
1. (1 pt) If a gene is repressible and under positive control, A. Is the regulatory protein an activator or repressor? B. Explain how an effector molecule, which binds to the regulatory protein, alters the regulatory protein’s ability to regulate expression of the gene. 2. (1 pt) Cis and trans are two terms used to describe mutations. A. Explain the molecular difference between these terms. B. indicate which type of mutation (cis or trans) is dominant to wild-type and which...
03 3. Understand the difference between positive and negative stress. 4. Define anger management and list...
03 3. Understand the difference between positive and negative stress. 4. Define anger management and list ways to control it in the workplace.
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b)...
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b) With the aid of a block diagram, derive the closed-loop gain, Af of a negative feedback system. (c) An amplifier with a negative feedback has a midband gain of 47.96 dB and low cutoff frequency of 75 Hz. The feedback network of the system has a feedback factor (B) of 0.0022. (1) Determine the midband gain and the low cutoff frequency if the amplifier...
biochemistry Question 2 [10] Tabulate the main differences between prokaryotic and eukaryotic replication. Question 3 [10]...
biochemistry
Question 2 [10] Tabulate the main differences between prokaryotic and eukaryotic replication. Question 3 [10] Describe the basic principle governing Meselson and Stahl's experiment. What would the results of Meselson and Stahl have looked like if DNA replication were conservative? And what would it have looked like if DNA replication were dispersive? [8] Question 4 Describe in detail the structure of tRNA and its function in translation Question 5 [20] 5.1 List the two types of transcription termination mechanisms...
1. Explain why unlike negative feedback, positive feedback is not a common feature of hormone pathways...
1. Explain why unlike negative feedback, positive feedback is not a common feature of hormone pathways that help to maintain homeostasis glands origin and function? Ca2+ level near the set point? individual and an individual with diabetes mellitus 2. Explain how iodine affects the functioning of the thyroid 3. How do the two fused glands of the pituitary gland differ in 4. How does calcitonin and parathyroid hormones maintain 5. Explain the control of blood glucose in both a healthy...
1. If you isolated a mutation that disrupted a positive regulatory gene for the thr operon...
1. If you isolated a mutation that disrupted a positive regulatory gene for the thr operon (which contains the genes needed to synthesize the amino acid threonine), what would the phenotype be? 2. Compare and contrast the positive regulation of expression of the lac operon by the cAMP-CAP complex with the negative regulation of expression of the lac operon by the LacI protein. You should have several similarities and parallel differences. 3. All human beings have a rich growth of...
1. Describe in detail how both positive and negative regulation control expression of the lac operon in bacteria. In doing this, also convey understanding of how and why expression of this operon is controlled two ways (positive and negative). Also answer, what are the energetic benefits to the cell of operon regulation? 2. What is horizontal gene transfer? Describe in detail the three mechanisms of horizontal gene transfer. What are the evolutionary advantages and costs of horizontal gene transfer. I...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
03 3. Understand the difference between positive and negative stress. 4. Define anger management and list ways to control it in the workplace.
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b) With the aid of a block diagram, derive the closed-loop gain, Af of a negative feedback system. (c) An amplifier with a negative feedback has a midband gain of 47.96 dB and low cutoff frequency of 75 Hz. The feedback network of the system has a feedback factor (B) of 0.0022. (1) Determine the midband gain and the low cutoff frequency if the amplifier...
biochemistry
Question 2 [10] Tabulate the main differences between prokaryotic and eukaryotic replication. Question 3 [10] Describe the basic principle governing Meselson and Stahl's experiment. What would the results of Meselson and Stahl have looked like if DNA replication were conservative? And what would it have looked like if DNA replication were dispersive? [8] Question 4 Describe in detail the structure of tRNA and its function in translation Question 5 [20] 5.1 List the two types of transcription termination mechanisms...
1. Explain why unlike negative feedback, positive feedback is not a common feature of hormone pathways that help to maintain homeostasis glands origin and function? Ca2+ level near the set point? individual and an individual with diabetes mellitus 2. Explain how iodine affects the functioning of the thyroid 3. How do the two fused glands of the pituitary gland differ in 4. How does calcitonin and parathyroid hormones maintain 5. Explain the control of blood glucose in both a healthy...
Most questions answered within 3 hours.
-
A manufacturing company preparing to build a new plant is
considering three potential locations for it....
asked 1 minute from now -
B. If compound Y has approximately the same values of solubility
in toluene as compound X,...
asked 45 minutes ago -
Oscar Inc. has inventory in Japan valued at 39,051,000 Yen one
year ago. One year ago...
asked 51 minutes ago -
If Canada suffered from "fundamental disequilibrium," and its
government choose not to devalue its currency, a...
asked 1 hour ago -
4. How many input & output Key Value Pairs are passed into,
and emitted out of...
asked 56 minutes ago -
Why would your heart not function well if constructed of
skeletal muscle? What is the particular...
asked 1 hour ago -
Please respond to this essay question in full essay form for
Chemistry 1102 Organic and Biochemistry:...
asked 1 hour ago -
Determine the head loss and velocity of flow in a water supply main
of 15.0 cm...
asked 1 hour ago -
A marketing executive who knowingly authorizes a shoddy
defective product to be brought to market is...
asked 1 hour ago -
Write a psudocode:
1. Define a function called authorize that takes in 2 strings,
uName, and...
asked 1 hour ago -
What Hall voltage (in mV) is produced by a 0.180 T field applied
across a 2.60...
asked 1 hour ago -
What mass of ethylene glycol (C2H6O2) must be added to 211.0 g
of water to obtain...
asked 1 hour ago