What is the function of the phloem in plants?
a. To transport sap
b. To transport nutrients
c. To transport dissolved sugars
d. To transport water and food
e. To transport water and minerals
c
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Which of these is the site for protein modification?
a. nucleus b. cytoskeleton c. mitochondria d. rough endoplasmic reticulum e. nucleolus
Asexual reproduction occurs during _____
A) meiosis B) mitosis C) fertilization D) chromosome exchange between organisms of different species
Comparison of two-dimensional gels from cells in stationary versus active growth phases reveals that one protein (A) has disappeared and a slightly larger protein (B) has appeared in the active cells
Mass spectrophotometry of the two spots indicates that the new larger protein (B) has sequences that match the smaller protein (A). Which of the following statements is not supported by this result? A. Proteins A and B are the same; however protein A has been covalently modified by phosphorylation. B. Proteins A and B are the same; however protein B has been bound by a cofactor. C. Proteins A and B are the same; however protein B has been bound by metal ions. D. Proteins A and B are the same; however protein B has been covalently modified by phosphorylation. E. Proteins A and B are the same; however protein A has been covalently modified by proteolytic cleavage.
Inflammation of the mucous membranes of the sinuses is called ________
A) asthma B) sinusitis C) respiratory distress syndrome D) laryngitis