Which of the following statements about protein signals involved in the control of the cell cycle is false?

Question by april: Which of the following statements about protein signals involved in the control of the cell cycle is false?
A) Transition from G1 to S and G2 to M depends on the phosphorylation of certain key proteins by cyclin-dependent kinase or Cdk.
B) Cdk's must be bound with a specific cyclin to be active as kinases.
C) In humans, cyclin D-cdk4 triggers the G1-to-S transition, whereas cyclin B-cdk1 triggers the G2-to-M transition.
D) External control mechanisms involving growth factors and hormones can activate cells that are arrested or are cycling slowly.
E) The phosphorylation of retinoblastoma protein effectively inhibits cell division.


Best answer:

Answer by Carlitos
I don't' know! sorry :(

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What is one of the advantages of producing human growth hormone (HGH) from a cloned gene in a bacterial cell?

Question by rachael: What is one of the advantages of producing human growth hormone (HGH) from a cloned gene in a bacterial cell?
A. The bacterial protein has a different amino acid sequence that is more effective.
B. As the protein is introduced therapeutically, it transfers the HGH gene as well.
C. Larger quantities are available.
D. A gene cloned from mice, rather than from humans can be used.
E. The product can be administered by infecting a person with the recombinant bacteria.


Best answer:

Answer by Kutmasta
My guess is C.

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What type of cell can be produced by an embryonic stem cell?

Question by : What type of cell can be produced by an embryonic stem cell?
A. muscle
B. bone
C. nerve
D. all the above




Parkinson's disease is caused by a lack of
A. dopamine
B. human growth hormone
C. adrenaline
D. aldosterone


Creating embroyos to harvest embroyonic stem cells to treat disease is termed
A. reproductive cloning
B. transgenic biotechnology
C. therapeutic cloning
D. embroyonic biotechnology


Best answer:

Answer by dustin s
1 any cell so D
2. A dopamine
3. C therapeutic cloning

i check them all too :D

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what hormone is necessary for glucose to move through a cell membrane?

Question by derekb0630: what hormone is necessary for glucose to move through a cell membrane?
4 to choose from a) Frank
b) Testosterone
c) Human growth hormone
d) Insulin


Best answer:

Answer by medtekph
D. Insulin

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