Which of the following crosses lipid bilayers the fastest?
A) a sodium ion
B) a small, polar molecule like water
C) a large, polar molecule like glucose
D) a small, nonpolar molecule like oxygen (O2)
Answer: D
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Why is there more energy stored in fats as opposed to sugars?
a. Fats are more prevalent in the body. b. Fats are more chemically related to ATP. c. Fats are processed differently after the citric acid cycle. d. Fats are in a more reduced state. e. Fats are in a more oxidized state.
The concepts of transcription and translation have been said to form the ‘central dogma’ of molecular biology. Is this a
fitting description? What will be an ideal response?
Which of the following is a bacterial infection that can cause the uterine tubes to be blocked by scar tissue?
A) Chlamydia B) Genital herpes C) HIV D) Trichomoniasis E) HPV
It's the ninth inning, and the bases are loaded. As the pitcher winds up to throw the ball, how does each tissue in his arm contribute to this critical pitch? The ________ of his fingers grips the ball. His ________ sends instructions that trigger his ________ to contract. His ________ provides stability and transmits the force produced.
A. ectoderm; ectoderm; mesoderm; endoderm B. epithelium; ectoderm; mesoderm; endoderm C. epithelial tissue; nerve tissue; muscle tissue; connective tissue D. connective tissue; nerve tissue; muscle tissue; epithelial tissue