DNA is made up of many
ucleotides.
RNA molecules.
proteins.
amino acids
nucleotides.
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Which of the following is not associated with adhesive junctions?
A) desmosomes B) hemidesmosomes C) plaques D) connexin E) cadherins
Chromatin remodeling
a. is subject to well-characterized stages of regulation by the cell. b. blocks access to genes that should not be expressed in a particular cell. c. is unaffected by alterations to the DNA sequences of a cell. d. results in specific patterns of gene expression. e. is generally independent of histone protein arrangements.
What happens to a retinal photopigment when it captures a photon?
A. It releases an electron. B. It fluoresces. C. It changes shape. D. It begins to vibrate. E. It does nothing.
A leaf primordium is initiated as a small mound of tissue on the flank of a dome-shaped shoot apical meristem. The earliest physical evidence of the site of a newly forming leaf primordium would be
a. development of chloroplasts in a surface cell of the shoot apical meristem. b. cell division in the shoot apical meristem with the newly forming walls perpendicular to the surface of the meristem. c. preprophase bands parallel to the surface of the meristem in subsurface cells of the shoot apical meristem. d. elongation of epidermal cells perpendicular to the surface of the shoot apical meristem. e. formation of stomata in the epidermal layer of the shoot apical meristem.