How many tissue layers are in the embryos of sponges?
A) None B) One C) Two D) Three E) Four
A
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Inflammation of the membranes around the brain or spinal cord is called ________.
Fill in the blank(s) with the appropriate word(s).
The direct visualization of a developing fetus to diagnose disorders is called
a. chorionic villus sampling. b. preimplantation diagnosis. c. amniocentesis. d. fetoscopy. e. senescence.
Phosphofructokinase is an important control enzyme in the regulation of cellular respiration. Which of the following statements concerning phosphofructokinase is not true?
A) It is activated by AMP (derived from ADP). B) It is inhibited by ATP. C) It is activated by citrate, an intermediate of the citric acid cycle. D) It specifically catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, an early step of glycolysis. E) It is an allosteric enzyme.
Gram-staining of bacteria provides all the physical characterization necessary to identify bacterial species.
Answer the following statement true (T) or false (F)