Which of the following are features of guard cells that enable them to function?
A. thick inner walls
B. chloroplasts
C. cellulose microfibrils
D. their shape
E. All of these are true
E. All of these are true
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If this molecule is destined to deliver an arginine to a ribosome for incorporation into a growing polypeptide, which one of the following 3' to 5' sequences would not be found in the region labeled (C)?
A. GCA B. GCC C. UCU D. AGG E. UCC
You have genetically engineered a yeast cell to make a protein that will ultimately be secreted from the cell. If all is functioning well, in which order (from first to last) do you expect to find the protein in the cell until it is secreted?
A) rER ? Golgi ? secretory vesicle ? environment B) rER ? Golgi ? sER ? nucleus ? environment C) nucleus ? rER ? Golgi ? secretory vesicle ? environment D) sER ? Golgi ? secretory vesicle ? environment E) rER ? secretory vesicle ? Golgi ? environment
Which flower part develops into a fruit?
a. ovule b. ovary c. base of the style d. stigma e. stamen
In an experiment, some herbaceous, nonwoody plants were exposed to frequent windy conditions or mechanical shaking for several hours per day. The flexibility of these plants was due to the ________ cells.
A. parenchyma B. sclerenchyma C. periderm D. aerenchyma E. collenchyma