Cultured Mammalian Cells Grown in Thymidine for Many Generations Were

question 8

Multiple Choice

Cultured mammalian cells grown in thymidine for many generations were allowed to undergo replication in the presence of bromodeoxyuridine (BrdU) ,which replaces thymidine in DNA.After one round of replication,what would the DNA look like if replication were dispersive?

• A)All chromatids have one strand that contains BrdU and one strand that does not.
• B)All chromatids have two strands that contain BrdU.
• C)Half of the chromatids have two strands that contain BrdU and half of the chromatids have 2 strands lacking BrdU.
• D)Both strands of each chromatid contain mixtures of BrdU and thymidine.
• E)All chromatids lack BrdU.

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Definitions:

Tertiary Circular Reaction

A stage in Piaget's theory of cognitive development during which toddlers experiment with new behaviors to see the outcomes, typically observed around 12 to 18 months of age.

Invention

The creation of a new device, method, or process, developed from study and experimentation.

Scheme Assimilation

The cognitive process by which new information is absorbed into existing mental frameworks or schemas.

Sensorimotor Development

The stage of cognitive development, according to Piaget, from birth to about two years, where infants learn through interacting with their environment using their senses and motor actions.