External fertilization
A. requires specialized behavior.
B. occurs in amphibians.
C. often leaves fertilized eggs susceptible to predation.
D. involves the release of eggs and sperm into a body of water.
E. All of these statements are correct.
Answer: E
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Why do positively charged amino acids appear more often than usual in histone proteins?
A. Because histones have a higher molecular mass, which improves DNA compaction B. Because histones are strongly attracted to the positively charged phosphate backbone of DNA C. Because histones and DNA have opposite charges, which improves the compaction of DNA into nucleosomes D. Because histones and DNA have the same charge, which improves the compaction of DNA into nucleosomes
Food allergies include gastrointestinal symptoms and often hives.
Answer the following statement true (T) or false (F)
What is the proper order of events in the expression of a eukaryotic protein?
A) DNA unpacking, mRNA transport through nucleus, mRNA splicing, protein modification B) DNA unpacking, mRNA splicing, translation, protein folding C) transcription, translation, addition of cap and tail to mRNA, DNA unpacking D) transcription, mRNA splicing, protein modification, translation
What development has led to substantial reductions in the rate with which children are born with Tay-Sachs disease?
a. The use of genotyping in mate selection. b. All of the above. c. People refraining from having children. d. Use of abortion.