White blood cells engulf bacteria using _____

A) phagocytosis
B) pinocytosis
C) osmosis
D) receptor-mediated exocytosis


A

Biology & Microbiology

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Which one of the following is nottrue of tRNA molecules?

A. tRNA molecules are single-stranded RNA. B. The 3'-terminal nucleotide of tRNA is the site of amino acid attachment. C. The anticodon arm of tRNA contains a three nucleotide sequence that is identical to a specific mRNA codon. D. tRNA molecules contain the unusual nucleotides dihydrouridine, pseudouridine, and ribothymine.

Biology & Microbiology

After yet another patron dripped sweat on her desk, the clerk at the gym complained, "It's gross working at a gym, with everyone sweating all the time." "Yes," the manager replied, "and it's probably costing us more for ________, but I'll bet we're saving on ________."

A. weight machines; treadmills B. towels; heating C. the water cooler; towels D. the water cooler; air conditioning

Biology & Microbiology

Which class of pattern-regulating genes is responsible for specifying organs and appendages?

A. homeotic B. maternal C. segmentation D. None of the choices is correct.

Biology & Microbiology

Using the accompanying diagram, which of the following corresponds to the +1 nucleotide?

A) A B) B C) C D) F E) G

Biology & Microbiology