A) Describe how allosteric enzymes are regulated by activator and inhibitor regulatory molecules.B) Explain how ATP and ADP act as allosteric regulators
... [Show More] of enzymes that are responsible for ATP production, and how that is an example of feedback inhibition.
C) What is feedback inhibition? How is the ATP generating pathway discussed in part B an example of feedback inhibition?
Answer:
A) Activator molecules regulate Allosteric enzymes by binding to a regulatory site and stabilizes the area that has active sites that are functional. Inhibitor regulatory molecules stabilize the Allosteric enzymes by binding to the part of the enzyme that is inactive.
B) ATP is a renewable resource that can be regenerated by the addition of phosphate to ADP. With these two organic compounds relying on each other they act like allosteric regulators for enzymes that make the production of ATP. The molecules that bind cellular respiration enzymes act as signals, giving the enzyme information about the cell's energy state. AMP and ADP bind to the allosteric site as to facilitate the formation of the R state by inducing structural changes in the enzyme. An example of feedback inhibition is an anabolic pathway. Anabolic pathways are those that require energy to synthesize large molecules.
C) Feedback inhibition is a method of metabolic control in which the end product of a metabolic control in which the end product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway. The reason an ATP-generating pathway formed by the ATP itself is because of feedback inhibition. Some cells use this five-step pathway to synthesize the amino acid isoleucine from threonine, another amino acid. As isoleucine accumulates, it slows down its own synthesis by allosterically inhibiting the enzyme for the first step of the pathway. Feedback inhibition thereby prevents the cell from making more isoleucine than is necessary, and thus wasting chemical resources.
Explanation: My teacher gave me a 100% on this short writing
A. Explain the structure of the DNA double helix, including nucleotides and the way in which they are bonded.
B. Discuss the similarities and differences of DNA replication on the leading and lagging strands
Answer:
A. “The DNA molecule is usually a double helix, with the sugar-phosphate backbones of the antiparallel polynucleotide strands on the outside of the helix. Hydrogen bonds between pairs of nitrogenous bases hold the two strands together. As illustrated here with symbolic shapes for the bases, adenine (A) can pair only with thymine (T), and guanine (G) can pair only with cytosine (C). Each DNA strand in this figure is the structural equivalent of the polynucleotide. A tRNA molecule has a roughly L-shaped structure, due to complementary base pairing of antiparallel stretches of RNA. In RNA, A pairs with U.” from Campbell Biology in Focus,3e, Chapter 3: Carbon and the Molecular Diversity of Life, Concept 3.6: Nucleic acids store, transmit, and help express hereditary information. Basically it is saying that DNA molecules are usually double helixes and double helixes consist of hydrogen bonds, for example adenine can only pair with thymine and guanine can only pair with cytosine, these two strands of sugar phosphate backbones are similar structure of polynucleotides. Then the tRNa molecules create a L-shape structure caused from the complementary base pairings, the adenine with thymine and guanine with cytosine.
“DNA polymerases proofread new DNA, replacing incorrect nucleotides. In mismatch repair, enzymes correct errors that persist. Nucleotide excision repair is a general process by which nucleases cut out and replace damaged stretches of DNA.”- from Campbell Biology in Focus,3e Concept 13.2: Many proteins work together in DNA replication and repair. It’s saying that DNA polymerases check new DNA for problems and replaces incorrect nucleotides. In a mismatch repair enzymes correct errors they keep on coming happening. Nucleotide excision repair is a process where nucleases cut out damaged DNA and completely replace them.
“Each strand is composed of nucleotides bonded together covalently between the phosphate group of one and the deoxyribose sugar of the next. From this backbone extend the bases.” - from Concepts of Biology – 1st Canadian Edition, chapter 9.1 The Structure of DNA. This means every DNA strand is composed of nucleotides covalently bonded with the phosphate group of one and the deoxyribose of another.
B. “It is traditional—and convenient—to represent DNA polymerase molecules as locomotives moving along a DNA railroad track, but such a model is inaccurate in two important ways. First, the various proteins that participate in DNA replication actually form a single large complex, a “DNA replication machine.” Many protein-protein interactions facilitate the efficiency of this complex. For example, by interacting with other proteins at the fork, primase apparently acts as a molecular brake, slowing progress of the replication fork and coordinating the placement of primers and the rates of replication on the leading and lagging strands. Second, the DNA replication complex may not move along the DNA; rather, the DNA may move through the complex during the replication process.”- from Campbell Biology in Focus,3e, chapter 13: The Molecular Basis of Inheritance Concept 13.2: Many proteins work together in DNA replication and repair. From this excerpt, we can understand the difference between leading and lagging strands because of the way they process DNA. In lagging the strands DNA discontinuously grows from Okazaki fragments while lending strands continuously grow through DNA replication.
Explanation:
my teacher gave me a 100%
Which action invalidates the contract Kyle signed?a.
Kyle missed his monthly payment.
b.
Kyle split the missing payment into three equal parts.
c.
Kyle did not notify his bank with his intention to split up the missing payment.
d.
Kyle did not add one-third of the missing payment to the next three monthly payments.
Answer:
It is C I just got it correct
Use the drop-down menus to identify the correct spelling for each word in the paragraph.Universal themes in literature provide ideas that most readers can relate and understand. Some examples
vis no place like home" and quality of character is most important." These universal truths help
readers
that they are not alone. As they connect to the
of the characters they read about
they can feel less isolated from the world.
are
Answer:
To
there
believe
experience
Explanation:
Use the drop-down menus to identify the purpose and audience for your presentation. What is the purpose of your presentation? Who is your audience?
Answer:
The answer to the prompt "Create a presentation to convince a group of your peers to join you in taking a stand on an important environmental issue." is
What is the purpose of your presentation?
to persuade someone to take a stand
What is the topic of your presentation?
an important environmental issue
Who is your audience?
peers
A structural change in the alpha-factor of Saccharomyces (a type of yeast) is shown to render the molecule defective. What effect would this mutation have on the reproductive behavior for this yeast cell species? Justify your claim by discussing cell signaling and response events.
Answer:
The structural change of the alpha factor (receptor) on yeast changes its ability to function. (Common theme in cell biology is that “structure determines function”) if the yeast lose the structure of their alpha receptors, they lose the ability to divide and reproduce. If the structure of the alpha receptor has been compromised, the yeast cell loses its ability to divide/reproduce. (Loss of structure = loss of function). Yeast can also divide through meiosis, so can help produce four more cells. This creates types of alpha cells, all four of these are going to come through meiosis from this original diploid cell. And since they went through meiosis, each of them are going to be haploid. So these are all going to be haploids. This becomes 16 chromosomes total, 16 chromosomes, chromosomes, each of them. Yeast have two mating types, a and α (genotypes MATa and MATα, respectively). When a yeast cell is stimulated by pheromone secreted by a nearby cell of the opposite mating type, it undergoes a series of physiological changes in preparation for mating. These include significant changes in the expression of about 200 genes (about 3% of the genome), arrest in the G1 phase of the cell-cycle, oriented growth toward the mating partner, and, ultimately, the fusion of the plasma membranes of the mating partners, followed shortly thereafter by the fusion of their nuclei. The entire process takes about 4 h.
Explanation:
I got a 100%
A) Describe how allosteric enzymes are regulated by activator and inhibitor regulatory molecules.B) Explain how ATP and ADP act as allosteric regulators of enzymes that are responsible for ATP production, and how that is an example of feedback inhibition.
C) What is feedback inhibition? How is the ATP generating pathway discussed in part B an example of feedback inhibition?
Answer:
A) Activator molecules regulate Allosteric enzymes by binding to a regulatory site and stabilizes the area that has active sites that are functional. Inhibitor regulatory molecules stabilize the Allosteric enzymes by binding to the part of the enzyme that is inactive.
B) ATP is a renewable resource that can be regenerated by the addition of phosphate to ADP. With these two organic compounds relying on each other they act like allosteric regulators for enzymes that make the production of ATP. The molecules that bind cellular respiration enzymes act as signals, giving the enzyme information about the cell's energy state. AMP and ADP bind to the allosteric site as to facilitate the formation of the R state by inducing structural changes in the enzyme. An example of feedback inhibition is an anabolic pathway. Anabolic pathways are those that require energy to synthesize large molecules.
C) Feedback inhibition is a method of metabolic control in which the end product of a metabolic control in which the end product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway. The reason an ATP-generating pathway formed by the ATP itself is because of feedback inhibition. Some cells use this five-step pathway to synthesize the amino acid isoleucine from threonine, another amino acid. As isoleucine accumulates, it slows down its own synthesis by allosterically inhibiting the enzyme for the first step of the pathway. Feedback inhibition thereby prevents the cell from making more isoleucine than is necessary, and thus wasting chemical resources.
Explanation: My teacher gave me a 100% on this short writing
A financial transaction that is added to a ledger balance is called a credit. Please select the best answer from the choices provided T or F
Answer:
The answer is True, I just took the test
Which consequences resulted from Reggie Shaw’s decision to text while driving? Check all that apply. Reggie was charged with negligent homicide. Reggie was incarcerated after his conviction. Reggie’s family disowned him. Reggie had to live with the knowledge he had killed two people. The Furfaro and O’Dell families lost their husbands and fathers.
The following consequences resulted from Reggie Shaw’s decision to text while driving:
• Reggie was charged with negligent homicide
• Reggie had to live with the knowledge he had killed two people.
Answer: Option A and D
Explanation:
As usually Reggie Shaw decided to travel by self driving from Tremonton to Logan on 22nd September, 2006 and he opted for texting and reading messages on his mobile phone while driving which resulted into one of the silliest mistakes people commit while driving and originate victims of texting and driving. He had to live with the thoughts and memories that he is responsible for death of two personalities Keith O’Dell and James Furfaro.
He admitted his mistake and when he met the daughter of one of the victims named Megan, he found that she is ready to forgive him because she believed in forgiving than become carrier of grievances and enmity. Therefore, her decision leads Reggie to become speaker and oppose texting and driving.
What is the significance of the eagle’s stance?The eagle represents the willingness of the United States to use force to protect its territories.
The eagle shows that the United States has expanded enough.
The eagle represents the threat the United States poses to other countries.
The eagle shows that United States values freedom and liberty.
Answer:
-The eagle shows that United States values freedom and liberty. [Show Less]