An amino acid that cannot by synthesized by cellular biochemical pathways (and therefore must be obtained from the diet) is called a(n) ____ amino acid

Fill in the blank with the appropriate word.


essential

Biology & Microbiology

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Type 1 fucosidosis is a rare human disease. Patients cannot hydrolyze the disaccharide fucose, and as a result have severe neurological decline and die by age 6. The disease is due to a defect in the gene that encodes the lysosomal enzyme that breaks down fucose (?-1-fucosidase), and is inherited in an autosomal recessive manner. Jane and John have a child who has Type 1 fucosidosis. What is the probability that their next two children will NOT have the disease?

A. None (all of their children will have the disease) B. 1/2 C. 3/4 D. 1/8 E. 9/16

Biology & Microbiology

Which of the following species does NOT fit

in the type III survivorship curve?

a. bees b. humans c. salamanders d. snakes e. goldfish

Biology & Microbiology

Which uterus layer is highly elastic and allows the accommodation of a nine-month-old fetus?

A. Endometrium B. Myometrium C. Exometrium D. Hypometrium

Biology & Microbiology

A nucleotide consists of ____

a. a five carbon sugar, a nitrogenous acid, and a phosphate group b. a six carbon sugar, a nitrogenous base, and a phosphate group c. a five carbon sugar, a nitrogenous base, and a phosphate group d. a six carbon sugar, a nitrogenous acid, and a phosphate group e. a four carbon sugar, a nitrogenous acid, and a phosphate group

Biology & Microbiology