A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5M solution of glucose into the cell and then place the cell into a beaker containing 10M glucose. What effect do you expect to observe?
A. Water moves out of the cell
B. Glucose moves out of the cell
C. No net change in cell weight
D. Water moves into the cell
E. Glucose moves into the cell
A
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Gene regulation during development is _____, which means that _____
A. restrictive; genes are successively lost over time B. restrictive; genes lose developmental potential over time C. hierarchical; genes expressed at each stage control the expression of genes that act later D. hierarchical; genes are turned on in a specific sequence, starting with totipotent and ending with multipotent E. combinatorial; genes expressed at each stage control the expression of genes that act later
Which RNA is the first to be activated in the
process of protein synthesis?
a. mRNA b. tRNA c. rRNA d. dRNA e. sRNA
Which of the following statements about root cap is FALSE?
a. It protects the delicate root apical meristem b. It secretes lubricating polysaccharides c. It orients the root that it grows downward d. It loses cells during root growth. e. It absorbs nutrients.
Which of the following DOES NOT MATCH?
A. Endospore===dormant form of life that resist elements B. Pili===helps bacteria attach to host surface C. they all match D. Plasmid===helps transfer genetic material between bacteria E. Capsule===helps bacteria resist phagocytosis