The person who described the "wee animalcules" was
A) Robert Hooke.
B) Antoni van Leeuwenhoek.
C) Louis Pasteur.
D) Ferdinand Cohn.
Answer: B
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When epinephrine binds to its G-protein linked receptor ____ is activated producing ___.
A. phospholipase C, diacylglyceride B. kinase, calcium C. kinase, transcription factor D. enzyme linked receptors, protein kinase E. adenylyl cyclase, cAMP
Four of the five conditions listed below are caused
by chromosomal nondisjunction. Select the exception. a. Down syndrome b. Huntington disease c. Turner syndrome d. Klinefelter syndrome e. trisomy 21
Which of the following statements is false?
a. Tobacco smoking is the most serious risk factor for cardiovascular disease. b. Until age 50, males have a greater risk of a heart attack than females. c. Hypertension is called the silent killer. d. In atherosclerosis, the diameter of the lumen of a blood vessel decreases. e. If a blood clot becomes dislodged and travels in the bloodstream, it is called a thrombus.
Where does the process of translation of nuclear protein-coding genes in eukaryotic cells occur?
a. in the nucleolus b. in the nucleus c. in the Golgi apparatus d. in the cytoplasm