In Drosophila, two maternal transcripts that are distributed evenly throughout the oocyte prior to fertilization are
A) caudal and knirps.
B) bicoid and nanos.
C) caudal and hunchback.
D) sevenless and even-skipped.
C) caudal and hunchback.
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Every protein is assembled on ____ according to instructions that are copied from ____
a. mRNAs; tRNAs b. tRNAs; mRNAs c. ribosomes; mRNA d. tRNAs; DNA e. ribosomes; DNA
As the sun is setting, you notice bats coming out of a cave. In the very early morning several days later
you notice them entering the cave. Which circadian rhythm would best explain this observation? a. crepuscular b. nocturnal c. diurnal d. lunar e. asynchronous
Which of these statements about the composition of membranes is generally true?
A. The lipid composition of all membranes of eukaryotic cells is essentially the same. B. All biological membranes contain cholesterol. C. Free fatty acids are major components of all membranes. D. The inner and outer membranes of mitochondria have different protein compositions.
The exchange of oxygen and carbon dioxide between the blood and the lungs is called ________
A) internal respiration B) inspiration C) external respiration D) exhalation