Opsin is a ____________ in photoreceptor cells
A. transmembrane protein
B. light-absorbing compound
C. sodium leak channel
D. G protein coupled receptor
A
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The importance of crossing over during meiosis is
a. to hold homologous pairs of chromosomes together. b. to result in chromosomes consisting of two identical sister chromatids. c. to result in daughter nuclei with too much or too little genetic material. d. to ensure that the developing zygote receives cytoplasm from one of the parents. e. to allow formation of parental chromosomes.
People often use the term "theory" in a variety of ways, but to a scientist, a theory has a specific meaning. Briefly describe the important features of a scientifically based theory
What will be an ideal response?
All of the human genome encodes proteins
Indicate whether the statement is true or false
Macromolecules are made up of smaller subunits called
A. Monomers B. Polymers C. Isomers D. Cells E. Aggregates