In insects, oxygen passes from the ______ to the tissues
a. cuticle of the epidermis to the blood
b. tracheae directly
c. tracheae to the blood
d. lungs to the blood
e. gills to the blood
B; Unlike arachnids (of which tarantulas are an example) insects do not use respiratory pigments to carry oxygen in the blood, but rather deliver it directly through tracheae, which penetrate the body such that all cells are close to one of the branches and can exchange oxygen directly.
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You have identified an enzyme that appears to be involved in the addition of palmityl group (a fatty acid) to certain proteins. Knowing that palmitoylated proteins are usually targeted for delivery to the plasma membrane, in which organelles might this enzyme be expressed?
A. Golgi apparatus and nucleus B. Golgi apparatus and endoplamic reticulum C. Endoplamic reticulum and ribosomes D. Endoplamic reticulum and nucleus Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about protein transport to the plasma membrane? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What ensures that the correct amino acid is added during translation?
A) the anticodon of a properly formed aminoacyl tRNA B) the methyl-guanosine cap of a properly modified mRNA C) the poly-A tail of a properly modified mRNA D) the twisting number of a properly supercoiled DNA
Studying the transcriptional activity of flagellar genes would not likely reveal differential changes when the cells are actively motile compared to nonmotile activity, because a two-component regulatory system is sufficient to control flagellar activity
Indicate whether the statement is true or false.
Gibberellins affect many processes in plants. In seeds embryos, gibberellins are believed to signal hydrolysis of the stored food reserves through inducing the synthesis of the enzyme ?-amylase. Which food source are gibberellins targeting with the release of ?-amylase?
A. fructose B. protein C. glycogen D. starch E. omega-3 fatty acids