Select the mismatched pair of Phylum Mollusca classes and their examples.
A. Polyplacophora—chitons
B. Gastropoda—slugs
C. Bivalvia—snails
D. Cephalopoda—nautilus
E. Gastropoda—nudibranchs
C. Bivalvia—snails
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Which protists produce much of the Earth's oxygen?
A. amoeba B. slime molds C. algae D. protozoa E. radiolarians
The mRNA of the Neurospora gene NMT1
a. catalyzes a reaction involving its own product. b. base-pairs with other mRNAs to regulate their expression. c. has two domains; one is a coding sequence and the other is a ribozyme. d. is only transcribed when the substrate of its product is present. e. is alternatively spliced depending on the concentration of a metabolite of vitamin B1.
When a ciliate reproduces asexually by mitosis
A. The macronucleus divides into two with each new cell receiving an identical macronucleus. B. The macronuclei fuse with the micronuclei and then divide into two with each new cell receiving an identical fused nucleus. C. The macronucleus doesn't divide but it goes to one new cell and the micronuclei go to the other. D. The macronucleus divides into four micronuclei with each new cell receiving two micronuclei each.
Although membrane proteins contribute roughly 50% of the total mass of the membrane, there are about 50 times more lipid molecules than there are protein molecules in cellular membranes. Explain this apparent discrepancy
What will be an ideal response?