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Cyclin-dependent kinases are importantin cell cycle progression. Briefly describe how their activity is regulated (both positive,negative?
Cyclin-dependent kinases play an important role in cell cycle progression.
A. Briefly describe how their activity is regulated (both positive and negative regulation).
B. Briefly describe the molecular functions they have.
C. Indicate whether cyclin-dependent kinases are typically oncogenes or tumor suppressor genes.
Biology5 hours agoCyclin-dependent kinases play an important role in cell cycle progression. A. Briefly describe how their activity is regulated ?
Cyclin-dependent kinases play an important role in cell cycle progression.
A. Briefly describe how their activity is regulated (both positive and negative regulation).
B. Briefly describe the molecular functions they have.
C. Indicate whether cyclin-dependent kinases are typically oncogenes or tumor suppressor genes.
Biology7 days agoHow do you draw the two enantiomers for C9H14O?
2 AnswersChemistry2 months ago
Describe how the stability is generally for 5 rings and 6 rings and what factors affects the energy level (stability) of such rings.?
During the development of new antiviral drugs, natural products are often used as a starting point. Such a thing
antiviral diterpen is shown in structure 7.
Describe how the stability is generally for 5 rings and 6 rings and what factors
affects the energy level (stability) of such rings. (8 p)
During a further development of antiviral drugs, one can start from
structural elements in natural products. The choice here is based on cyclohexane
1,2-diol.
f) Draw cyclohexane-1,2-diol (8) on cis and trans form in its most stable conformations
and indicate which is most stable. Justify the answer. (8p)
One of the stereoisomers of cyclohexane-1,2-diol does not rotate plane-polarized light. Describe
which and why. What class does this connection belong to? (5 p)
h) Synthesis of alcohols can be done via several different ways. One way is hydration
alkenes using strong acid and water as shown in the reaction scheme below. Vis
the reaction mechanism for the formation of 10 from 9. (10 p)
i) Describe why the substituents end up in the positions they do during the hydrogenation (5 p)
Chemistry2 months ago
Show product (s) with correct sterochemistry formed when binding B reacts with bromine (Br2).?
The epoprostenol derivative (7) is an agent that has recently been synthesized and is intended to be used as an anticoagulant
in the treatment of thrombosis.
7 contains a double bond that is reactive.
d) Show product (s) with correct sterochemistry formed when binding B reacts with bromine (Br2).
If there are several products, state which are major and which are minor products
Chemistry2 months ago
Draw the two enantiomeric products 9 and 10 b)Draw the reaction mechanism for how 9 or 10 can be formed from 7&8 and explain why two enantio?
Draw the two enantiomeric products 9 and 10 (8 p)
b) Draw the reaction mechanism for how 9 or 10 can be formed from 7 and 8 and explain
why two enantiomeric products are formed from the reaction mechanism (10 p)
c) How would you state that one has a racemic mixture of a substance? (5p)
Chemistry2 months agoCalculate theH + concentrationmol / L) in the stomach acid. Calculate the volume of stomach acid needed to dissolve 1.0 g of tooth enamel. ?
Frequent contact with stomach acid in case of vomiting or acid regurgitation will dissolve the tooth enamel. Therefore, severe acid damage to the teeth is often seen in people suffering from bulimia. The chemical reaction of the solution of tooth enamel, Ca10 (PO4) 6 (OH) 2, with acid can be considered as an acid-base neutralization reaction:
Ca10 (PO4) 6 (OH) 2 + 8H + → 10Ca2 + + 6HPO42- + 2H2O
In this task, stomach acid is considered as an aqueous solution of HCl (hydrochloric acid) with pH = 2. The molar mass of tooth enamel, Ca10 (PO4) 6 (OH) 2, is 1000 g / mol.
A. Calculate the H + concentration (in mol / L) in the stomach acid.
B. Calculate the volume of stomach acid needed to dissolve 1.0 g of tooth enamel.
1 AnswerChemistry2 months agoNaproxen is an anti-inflammatory drug that is a weak acid with a pKa value of 4.2 C. Calculate the pH?
Naproxen is an anti-inflammatory drug that is a weak acid with a pKa value of 4.2
C. Calculate the pH of an aqueous solution of 0.0010 M naproxen
1 AnswerChemistry2 months agosubstance that neutralizes 2.0 L of gastric juice at pH 2.0 Calculate how many grams of Mg (OH) 2 for neutralization to occur. ?
Heartburn (acid regurgitation) occurs when acidic gastric juice enters the esophagus. Heartburn can be treated with antacids. Magnesium hydroxide, Mg (OH) 2, is an antacid with a molecular weight of 58.3 g / mol. A person eats a dose of this substance that neutralizes 2.0 L of gastric juice at pH 2.0
B. Calculate how many grams of Mg (OH) 2 the person has eaten for neutralization to occur.
1 AnswerChemistry2 months agoCalculate how many moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0 ?
Calculate how many moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0
2 AnswersChemistry2 months agoWhat is the limit as x approaches 2 of ((x^3-4x))/(x^2-4x+4)) ?
3 AnswersMathematics2 years agoIn Octanol-water partitioning the two phases are far from entirely immiscible.how may affect the partitioning coefficient for a hydrophobic?
Discuss how this may affect the partitioning coefficient for a hydrophobic compound such as cyclohexane. Would you expect Kp to be higher or lower than in a partitioning experiment using n-hexane and water as the two bulk phases (n-hexane and water are essentially immiscible so in this case you would see the partitioning between two almost pure phases).
1 AnswerChemistry3 years ago
Elastomer-Evaluate the work of extension to l. PLEASE HELP BOOK ANSWER WRONG ?
i really dont know how they got this answer in the book, please help thank yo
1 AnswerPhysics3 years agoTo what extent do carboxylic acids generally dissociate?
1 AnswerChemistry3 years ago
