The endosymbiosis that formed mitochondria likely occurred after eukaryotes developed photosynthetic capabilities
Indicate whether the statement is true or false.
Answer: FALSE
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Which type of RNA shows enzymatic activity by catalyzing a peptide bond formation between amino acids?
a. mRNA b. tRNA c. rRNA d. all types of RNA e. no RNA shows enzymatic activity
Suppose that in the future, scientists identify bacteria on Mars and these organisms lack a site-specific recombination system. Which components would allow for site-specific recombination to occur in these bacteria?
A) FRT target sites and Flp recombinase B) FRT target sites and Cas9 enzyme C) an FRT target site and a loxP site D) a synthetic homologous chromosome
Vasoconstriction is a term that refers to the contraction of muscle in the walls of the blood vessels, thus causing the diameter of the blood vessel to decrease. Which one of the following types of muscle would be involved in this contraction?
A) skeletal B) smooth C) cardiac D) both cardiac and smooth E) both skeletal and smooth
Babies born before _____ after fertilization are considered premature.
A. 36 weeks B. 37 weeks C. 38 weeks D. 39 weeks E. 40 weeks