In skin, the cells of the epidermis connect to the basal lamina through cellular junctions known as hemidesmosomes. Select the cytoskeletal filament that helps maintain the integrity of this connection
A. intermediate filaments
B. microtubules
C. microfilaments
D. Responses a and c are both correct.
A
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Which statement best describes the mechanism(s) of posttranslational regulation of gene expression?
A. Covalent modification of newly synthesized proteins generally has no marked effect on protein function. B. Protein synthesis is often repressed by feedback or noncompetitive inhibition. C. Allosteric regulation following transcription of mRNA occurs in many biosynthetic pathways. D. Once a protein is synthesized, there is little to no posttranslational modification.
The two image-forming lenses of a compound light microscope are
(a) the condenser and objective. (b) the condenser and the ocular. (c) the objective and ocular. (d) none of these choices.
DNA sequence analyses indicate that the nearest living relatives to humans are:a
lemurs. b. gibbons. c. gorillas. d. orangutans. e. chimpanzees.
Most cases of hookworm infection are acquired by ingestion of adult forms in contaminated food or water
Indicate whether the statement is true or false