The fluid in the sarcoplasmic reticulum contains a high concentration of ________ ions, which are released by the stimulation of an action potential

A) iron B) potassium C) phosphorus D) sodium E) calcium


E

Biology & Microbiology

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Homeotic genes encode very important transcription factors that specify the identity of body parts or segments during development

For example, the development of legs on thoracic segments T1, T2, and T3 and wings on segment T2 is controlled by homeotic genes. A. true B. false

Biology & Microbiology

Most of the filtrate produced at the glomerulus is reabsorbed by the

a. papillary duct. b. loop of Henle. c. proximal tubules. d. distal tubules. e. peritubular capillary.

Biology & Microbiology

All the following are found in both plant and animal cells, except

a. cell wall b. cell membrane c. mitochondria

Biology & Microbiology

Using genetic engineering techniques, you remove the sequences that code for the ribosome-binding sequences of the bacterial LacZ gene. The removal of these sequences will lead to ___________

(a) more LacZ protein produced due to faster ribosome movement across the LacZ mRNA. (b) transcriptional repression, resulting in fewer mRNA molecules produced from this gene. (c) a longer half-life for the LacZ mRNA. (d) translational inhibition of the LacZ mRNA.

Biology & Microbiology