Phospholipids for cellular membranes are created in which component of the endomembrane system?
a. Golgi apparatus
b. lysosomes
c. rough endoplasmic reticulum
d. smooth endoplasmic reticulum
c. rough endoplasmic reticulum
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The changes that were necessary to cope with the heavy energy demands of flight in birds include all of the following except
A. efficient respiration. B. efficient circulation. C. endothermy. D. auxiliary air sacs and hollow bones. E. a three-chambered heart.
Which of the following assembles a short RNA chain as the first nucleotides in a new DNA strand?
a. topoisomerase b. primase c. DNA polymerase d. helicase e. DNA ligase
Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
Streptococcus mutans can produce dextran when sucrose is present in the absence of the enzyme dextransucrase
Indicate whether the statement is true or false.