When amino acids are broken down for energy, ammonia is created, which is converted into _____ and excreted in urine.

a. ammonium
b. uranium
c. urea
d. phosphatase


c. urea

Biology & Microbiology

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A signal sequence

A) directs RNA nucleotides to a particular gene. B) attracts tRNAs to an mRNA. C) is the first part of a protein's amino acid sequence that helps to direct it to a certain part of the cell. D) is a coding codon that mutates into a stop codon.

Biology & Microbiology

Which of the following respiratory control centers allows you to hold your breath before diving into a

swimming pool?

a. aortic bodies b. carotid bodies c. receptors of the medulla d. the limbic center of the brain e. higher brain centers of the cerebrum

Biology & Microbiology

What type of bond is formed between the hydroxyl group of one nucleotide and the phosphate group of an adjacent nucleotide, forming the sugar-phosphate backbone of DNA?

A) glycosidic bond B) phosphodiester bond C) ester linkage D) hydrogen bond E) ionic bond

Biology & Microbiology

What is the common name for single celled fungi?

What will be an ideal response?

Biology & Microbiology