During DNA replication,
A. the DNA double helix comes apart, and new nucleotides are brought in, forming two double helices.
B. two single strands of DNA come together, restoring complementary base pairing.
C. tRNAs bring specific amino acids to an mRNA molecule.
D. amino acids are joined.
Answer: A
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Which of the following drugs would be an effective means for lowering plasma cholesterol levels?
A) a drug that stimulates intestinal cholesterol transport B) a drug that stimulates the enzyme HMG coA reductase C) a drug that adds plant sterols and stanols to the diet D) a drug that binds to bile acids and prevents them from being reabsorbed or a drug that adds plant sterols and stanols to the diet E) a drug that binds to bile acids and prevents them from being reabsorbed
When looking at the ventral surface of the sheep brain, which of the following structures is the most anterior?
A. Facial nerves B. Oculomotor nerves C. Optic chiasma D. Olfactory bulbs E. Mammillary body
Daniella is a dancer trying to get into the New York City Ballet. She knows that it is very competitive, so she is practicing several hours a day. She also knows that ballerinas need to be very thin, so she is restricting her diet to 600 calories a day and only eats fruits and vegetables. She continues her workout and dietary routine for several months and on the day of her audition she feels
very weak. She ends up passing out during her audition and as the athletic trainer and physician are evaluating Daniella, they notice that she has several bruises and frequent muscle spasms. Why is Daniella having all of these problems? What will be an ideal response?
For each question, select the corresponding category:
1. lysosome 2. mitochondrion 3. ribosome 4. cilium 5. endoplasmic reticulum A. membranous organelle B. inclusion