In a eukaryotic cell, the Krebs cycle occurs in the

A. lysosome.
B. ribosome.
C. cytoplasm.
D. mitochondria.
E. nucleus.


D. mitochondria.

Biology & Microbiology

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Which one of the following is a glucocorticoid important in both gluconeogenesis (glucose produced from amino acids) during starvation and anti-inflammation? 

A. aldosterone B. cortisol C. glucagon D. insulin E. prolactin

Biology & Microbiology

In a person with cystic fibrosis, the mutation

causes which of the following to happen?

a. the protein clings to the inner surface of the plasma membrane b. the protein never leaves the endoplasmic reticulum c. the protein is shuttled to the nuclear membrane instead of the plasma membrane d. the protein is shuttled to the plasma membrane instead of the nuclear membrane e. the protein is expelled from the cell by exocytosis before it can do its job

Biology & Microbiology

The presence of a transit sequence directs a protein from the ________ to the ________

A) cytosol; mitochondrion or chloroplast B) endoplasmic reticulum; Golgi apparatus C) cytosol; plasma membrane D) endoplasmic reticulum; nucleus E) signal recognition particle; nucleus

Biology & Microbiology

________ is/are able to degrade infecting bacteriophage DNA, thus protecting the host cell.

A. Restriction endonucleases B. Protection exonucleases C. Modification methylases D. Lysozyme

Biology & Microbiology