Which of the following statements about collagen is false?
a. It is the most abundant protein in animal tissues.
b. It forms a double helix, with two collagen molecules wrapped around each other in a ropelike structure.
c. It contains an amino acid called hydroxyproline.
d. It is a secreted protein.
Ans: b. It forms a double helix, with two collagen molecules wrapped around each other in a ropelike structure.
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When the chromosomes line up in mitosis this is known as which phase?
A. Telophase B. Anaphase C. Metaphase D. Prophase
A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?
A) less than 5 weeks B) between 5 and 8 weeks C) between 8 and 14 weeks D) more than 14 weeks
Which of the following is not an autotroph?
a. yeast b. oak tree c. cyanobacterium d. algae e. grass
Experimentation is only one part of the process of scientific inquiry, but it is a very important step because it _________.
Fill in the blank(s) with the appropriate word(s).