Which of the following hormones is a steroid hormone?
A. insulin
B. follicle-stimulating hormone
C. progesterone
D. luteinizing hormone
E. antidiuretic hormone
Answer: C
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Which of the following is correctly matched with its description?
A. Highly repetitive DNA contains transposable elements and genes that are expressed in abundance and thus have many copies. B. Moderately repetitive DNA contains unique sequences, such as genes found in one or a few copies. C. Non-repetitive DNA is composed of thousands of copies of many short repeats. D. Moderately repetitive DNA contains retro elements, such as the Alu sequence. E. Moderately repetitive DNA contains transposable elements and genes that are expressed in abundance and thus have many copies
A researcher in a lab finds a microscopic organism that has no nucleus, but has distinctive structural molecules and
mechanisms of photosynthesis. The organisms are abundant in virtually every habitat on Earth. The researcher has identified this organism as belonging to the domain ____.
a. Bacteriab. Animalia c. Eukarya d. Protist e. Amoeba
Each of the following are electron carriers except ________.
A. FADP B. FAD C. NAD D. NADP
In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?
A) the plasma membrane and the sarcoplasmic reticulum B) troponin and tropomyosin C) calcium and tropomyosin D) acetylcholine and muscle cell receptors E) actin and myosin