Answer:
CDK is inactive without a cyclin bound to it.
Explanation:
CDKs are the cyclin-dependent kinases. These protein kinases serve to regulate the various stages of the cell cycle. Cyclins are the regulatory proteins. The levels of cyclins fluctuate during the cell cycle. Cyclins bind to respective CDKS to activate them. Unless cyclins bind to CDKs, these protein kinases are inactive. Cdk associates with cyclin and forms a cyclin–Cdk complex. For example, mitosis specific Cdk bind to cyclins and activated M-Cdk then activates the proteins that facilitate mitosis and inactivate the one that inhibits mitosis.
The process by which metabolic waste is eliminated from an organism.
Water is the compound must be present along with urea for the break down of urea.Thus, option B is correct.
<h3>What does urea break down into?</h3>
Urea and water combined together and results into the production of carbon dioxide and ammonia with the help of urease enzyme.
Urea + water = Carbon dioxide+ ammonia
Breakdown of urea occurs in a cycle known as urea cycle and it has five important steps:
- Formation of carbamoyl phosphate
- Synthesis of citrulline
- Cleavage of argininosuccinate
- Glucogenic and ketogenic amino acids
- Oxidation of Carbon skeleton of amino acids
Therefore,water is the compound must be present during the process of break down of urea.Thus, option B is correct.
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Your question is incomplete,but most probably your full question was,
What other compound must be present along with urea for the urease enzyme to break down urea?
A.ammonia
B.water
C. pyruvic acid
D. carbon dioxide
Answer:
Explanation:
what are the answer choices?
