Starting with shredded spinach leaves, you follow a procedure that separates cellular organelles into different fractions. To identify the fraction that contains the mitochondria, you should test for the presence of
A) aquaporin.
B) insulin receptors.
C) phospholipids present only in the mitochondrial outer membrane.
D) mitochondrial wall polysaccharides.
E) electron transport proteins.
Answer: E
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Where would Toll-like receptors be synthesized in a phagocyte?
A. on the rough endoplasmic reticulum B. in the cytosol C. in the Golgi apparatus D. on the smooth endoplasmic reticulum
RNA molecules that act as enzymes to catalyze specific biochemical reactions are
A) RNases. B) splice acceptors. C) ribozymes. D) tRNAs. E) restriction enzymes.
Which of the following statements is inconsistent with the results from investigations of genetic vs. environmental influences on IQ shown on the previous slide?
1.Children raised apart from a biological parent generally have IQs as similar to the parent as children who were raised by that parent.
2.Differences in IQ between siblings reared together are attributed both to variations in environment and to the fact that only half their genes are shared.
3.Nonbiological sibling pairs reared together show more concordance in IQ scores than would be expected based on degree of relatedness.
4.Differences in IQ between monozygotic twins reared separately can be attributed to environmental influences.
A root hair is an extension of a(n) endodermal cell. Indicate whether the statement is true or false