Which of the following is TRUE about water?

a. The oxygen end is slightly electropositive.
b. Hydrogen bonds hold water molecules
together.
c. Water covers about one-half of the surface
of the earth.
d. Hydrophobic interactions attract water
molecules.
e. Solvent properties are greatest with
nonpolar molecules


B

Biology & Microbiology

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Which of the following statements about El Niño are true?  

_____  Occurrence of El Niño is irregular and unpredictable. _____  The immediate effect of El Niño is a weakening in the east-to-west trade winds _____  Weakening in the trade winds results in more upwelling along the Peru-Ecuador coast. _____  El Niño results in the movement of weather systems from the western Pacific eastward. _____  El Niño events in the Pacific can influence weather as far away as Africa.

Biology & Microbiology

If you wanted to prevent a regulatory protein from changing gene expression, you would have to prevent physical contact between the protein and _____

A) ribosomes B) DNA C) ribozymes D) mRNA

Biology & Microbiology

Acetate is the starting point for synthesis of a cell's ____

Fill in the blank with the appropriate word.

Biology & Microbiology

Which of the following is NOT a common characteristic of both mitochondrial and chloroplast genomes?

A. Composed of a double stranded chromosome. B. Composed of a single circular chromosome C. Has a small genome. D. Chloroplast genome is larger than the mitochondrial genome.

Biology & Microbiology