When preparing a wet-mount slide of onion cells, a student put a drop of Lugol's iodine stain was added to
a. prevent the formation of air bubbles
b. make cell structures more visible
c. increase the magnification
d. increase the rate of photosynthesis in the cells
Answer: b. make cell structures more visible
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What molecular mechanism/feature does site-directed mutagenesis exploit to introduce a mutation at a specific site?
A) flanking complementary bound nucleotides permit non-complementary base pairing B) methylated nucleotides disrupt DNA polymerase's proofreading C) nucleotide substitution when one is depleted D) transposase-induced base pair changes
What are the two major components of cell membranes?
A. glycolipids and phospholipids B. cholesterol and proteins C. phospholipids and carbohydrates D. phospholipids and cholesterol E. phospholipids and proteins
Describe the major differences and similarities between gymnosperms and angiosperms
What will be an ideal response?
Which of these organism(s) photosynthesizes?
A. plants, algae, and cyanobacteria B. plants C. cyanobacteria D. lizards E. algae