Which of the following statements about phenylketonuria (PKU) is false?
A) Buildup of phenylpyruvic acid affects the nervous system.
B) The amino acid tyrosine cannot be made.
C) Production of the hormone thyroxin s affected.
D) The skin color of those with phenylketonuria is light because of decreased levels of melanin.
E) Adrenalin levels increase in the blood stream.
E
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What are the components of the growing protein chain created during translation?
a. monosaccharides b. lipids c. amino acids d. nucleotides
Which of the following collects urine and leads to the ureter on the outside of the kidney?
a. The renal artery b. The urethra c. The urinary bladder d. The renal pelvis
Which of the following is NOT found in the nucleus?
A. mitochondria B. nucleolus C. chromatin D. DNA
Unique features of the planctomycetes include ________.
A. their size: some are as large as protozoa B. twitching fimbriae that are required for motility C. a membrane-bound nuclear region D. resistance to ionizing radiation