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Large or charged molecules can move across a cell membrane, up a concentration gradient, by

Which of the following structures of a eukaryotic cell is not likely derived from endosymbiotic bacteria?

Which of the following does a competitive inhibitor most closely resemble, structurally-speaking?

Non-toxic strains of Vibrio cholerae can become toxic when they are in the human intestine along with toxic strains of the bacteria which contain phage.  This suggests that the toxin genes are acquired through

Which of the following is one of the non-membranous organelles of eukaryotic cells?

              developed the modern discipline of epidemiology while mapping cases of cholera around the Broad Street pump.  This work established that cholera was water-borne, as opposed to caused by miasmas (bad smells).

Which of the following has been genetically engineered to help prevent crops from freezing?

In addition to controlling gene expression at the level of transcription, cells can control it at the level of translation.             and               are two mechanisms by which this can be accomplished.

The functions of the endoplasmic reticulum (both RER and SER) is/are

During the aerobic catabolism of glucose, which of the following is produced only in the Krebs cycle?