Correlation between life span and the ability of fibroblasts to repair DNA in various mammalian species, Repair capacity is represented in autoradiography by the number of grains from radioactive thymidine per cell nucleus. According to graph, which factor exist on x-axis ? Note that the y-axis (life span) is logarithmic.

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#Question id: 2151

#SCPH28 | Zoology

Which of the following statement(s) is (are) true of transmembrane proteins?

a. All contain a hydrophobic α helix.

b. Some serve as membrane attachment sites for peripheral membrane proteins.

c. Some contain more than one membrane-spanning domain.

d. All are asymmetrically oriented in the lipid bilayer.

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#Question id: 15559

#SCPH06 I Botany

The majority of the antibiotics have been isolated from 

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#Question id: 1549

#SCPH05 I Biotechnology

the decision to translate  IgM versus IgD  heavy chains is made at the level of?

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#Question id: 2599

#SCPH28 | Zoology

The mRNA from the trp operon has a half-life of only about____

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#Question id: 6998

#SCPH28 | Zoology

Which of the following is an adult organism that has fewer than 1,000 cells?