How is the color of each of the major photosynthetic pigments (chlorophyll a, chlorophyll b, carotenes, and xanthophylls) related to the light wavelengths absorbed by that pigment?
What will be an ideal response?
Each pigment absorbs a different wavelength of visible light. For example the carotenes will absorb a wavelength between red and yellow.
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Activators and inhibitors that bind to enzymes at positions other than the active site of the enzyme bind to a(n) ____ site on the enzyme
Fill in the blank with the appropriate word.
Experiments on selective adhesion demonstrated
a. ectoderm cells have positive affinity for mesoderm cells but negative affinity for endoderm cells d. ectoderm cells have positive affinity for both endoderm and mesoderm cells b. ectoderm cells have negative affinity for mesoderm cells but positive affinity for endoderm cells e. endoderm cells have positive affinity for both ectoderm and mesoderm cells c. endoderm cells have positive affinity for mesoderm cells but negative affinity for ectoderm cells
During long-term stress, cortisol levels can remain high. What are some of the problems associated with this?
What will be an ideal response?
Chemicals in tobacco smoke can cause _____
a. DNA to break into pieces. b. mispairing of bases. c. kinking in the DNA molecule. d. the formation of nucleotide dimers. e. covalent bonding between adjacent adenine bases.