In a study of tadpole coloration, you noticed that certain percentage of tadpoles in a population displayed a decreased ability to shift from dark coloration at night to light coloration during the day
These individuals were studied and found to have the normal
number of melanophores that produced normal amounts of melanin pigment granules. You
remember reading about melanophores and pigment granule transport in cells and that it
involved the cytoskeleton. You investigated the cytoskeleton and found that all three
elements, including the one you suspected, are completely normal. You then decide to look
at the motor proteins to see if the cause might lie with one of them. Which of the following
would be your hypothesis?
A. The melanophores in these tadpoles have
partially or non-functional kinesin that would
normally transport organelles along
microtubules to the center of the cell.
B. The melanophores in these tadpoles have
partially or non-functional kinesin that would
normally transport organelles along
microfilaments to the center of the cell.
C. The melanophores in these tadpoles have
partially or non-functional dynein that would
normally transport organelles along
microtubules to the center of the cell.
D. The melanophores in these tadpoles have
partially or non-functional dynein that would
normally transport organelles along
microfilaments to the center of the cell.
E. The melanophores in these tadpoles have
partially or non-functional myosin that would
normally transport organelles along
microfilaments to the center of the cell.
C
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The structure indicated by the letter "B" above represents _____
a. actin b. a myofibril c. myosin d. the sarcoplasmic reticulum e. a muscle fiber
Red-green color blindness is an X-linked recessive
trait. Two normal-vision parents have a color-blind son. Indicate the genotype and phenotype of each parent and the son. What will be an ideal response?
When an allele can produce a range of phenotypes, its expression is said to be
a. clearly established. b. variable. c. codominant. d. incompletely dominant. e. incompletely penetrant.
________ is the term for multiprotein complexes in which a core enzyme is associated with additional protein components leading to its function
Fill in the blank(s) with correct word