What is the role of the large ribosomal subunits?

a. Binding to the mRNA
b. Reading the mRNA
c. Joining together amino acids to form a polypeptide chain
d. Folding the amino acids into proteins


c. Joining together amino acids to form a polypeptide chain

The large ribosomal subunit joins together the newly synthesized amino acids into a polypeptide chain.

Biology & Microbiology

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The feeding chambers inside the sponge are lined with specialized cells that generate a directed water current through the sponge and trap and ingest microscopic food particles. What are these cells called?

a. amoebocytes b. sclerocytes c. choanocytes d. pinacocytes

Biology & Microbiology

The scanning electron microscope differs from the transmission electron microscope in that the

scanning electron microscope:a. can view a live specimen. b. relies on the detection of electrons from the beam after contact with the specimens. c. can view the internal structure of a cell. d. utilizes a beam of light that passes through the specimen. e. gives a three dimensional image of the object being studied

Biology & Microbiology

What is a transgenic organism?

What will be an ideal response?

Biology & Microbiology

The difference-in-differences approach relaxes some of the required assumptions for establishing causality by leveraging what dimension of the empirical setting?

A. Observing repeated observations of the same cross-sectional units over time. B. Observing multiple cross-sectional units receiving the treatment. C. Being able to construct an instrument from the first stage difference. D. Observing a time series for one series.

Biology & Microbiology