Ascientist puts nucleotide chains of in a test tube under conditions allowing protein synthesis. soon the test tube is full of polypeptide chains composed only one the amino acid phenylalanine. what does this experiment indicate? a. the amino acid phenylalanine is composed of uracil. b. uuu codes for the amino acid phenylalanine. c. protein synthesis malfunctions in test tubes. d. most proteins contain only one type of amino acid.

answer: d

explanation:

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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