Biology, 13.12.2021 03:10 justiceisbae1
Scientists used cells called fibroblasts to study factors that cause nondividing cells in the G0 stage of the cell cycle to reenter the cell cycle and undergo mitosis. In a laboratory, fibroblasts typically grow and divide when they are cultured in a growth medium that contains 10% serum (the liquid part of blood that remains after blood clots). If fibroblasts are cultured for 48 hours in the absence of serum (serum-starvation), they stop dividing and enter the G0 stage of the cell cycle. The scientists divided serum-starved fibroblasts into groups to which they added no serum, 10% serum, or 0.1% serum. Each of the groups with 0.1% serum was also treated to block the production of only one or combinations of four proteins (p16, p18, p21, and p27) that are inhibitors of cyclin-dependent kinases. The scientists grew the fibroblasts for 48 hours and then measured the amount of DNA replication taking place to determine whether the cells had reentered the cell cycle. The scientists compared each group of cells to the group cultured with 10% serum and plotted the data (Figure 1).
Answers: 3
Biology, 22.06.2019 00:00
Question 1 of 102 pointswhich best describes adaptive radiation? oa. geographical isolation caused by an adaptationob. biodiversity resulting from few ancestorsoc. a decrease in the rate of speciationd. adaptations that organisms teach each other
Answers: 2
Biology, 22.06.2019 04:00
Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.
Answers: 1
Biology, 22.06.2019 07:50
Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?
Answers: 1
Biology, 22.06.2019 10:10
Jane has a sprained ankle, and her doctor gave her a prescription that states: “ibuprofen caps 200 mg tid po.” what does this prescription say, in spelled-out form?
Answers: 1
Scientists used cells called fibroblasts to study factors that cause nondividing cells in the G0 sta...
World Languages, 24.08.2021 09:20
Mathematics, 24.08.2021 09:20
Spanish, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Spanish, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
Mathematics, 24.08.2021 09:30
World Languages, 24.08.2021 09:30