In the following reaction, which of the following is an example of a substrate?
Lactase
Lactose ? Glucose + Galactose
A) lactase B) lactose C) galactose D) glucose
Answer: B
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With more than ____ species, flowering plants dominate the plant kingdom
a. 100,000 b. 175,000 c. 260,000 d. 375,000 e. 480,000
Please match the virulence factor of Streptococcus pyogenes to its description.
Streptolysin A) Surface antigen that serves as the basis for alphabetical grouping; protects bacterium from lysozyme B) Toxin that causes beta-hemolysis on blood agar and injures cells of the host C) Enzyme that plays a role in invasion by leading to the digestion of fibrin clots D) Projecting surface antigen that facilitates adherence and resists phagocytosis E) Chemical surface layer that prevents an immune response by the host F) Enzyme that promotes invasion into tissues by breaking down the binding substance in connective tissues
What is the fate of most of a woman’s mature eggs?
a. they are fertilized b. they are stored for future use c. they die d. they are reset back to primary oocytes e. they stay immature
Organisms develop a normal morphology because cells can receive and interpret
A. extracellular positional information B. intracellular positional information C. extracellular and intracellular positional information D. extracellular positional information, intracellular positional information, and signals from other developing organisms E. signals from other developing organisms