What is the function of the lacY gene in the lac operon?
What will be an ideal response?
The lacY gene codes for permease, a membrane-bound protein that transports lactose into the bacterial cell.
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Which of the following comparisons of the cellular features of complex charophycean algae and land plants is NOT true?
A. Land plants inherited phragmoplasts from complex charophyceans. B. Land plants inherited plasmodesmata from complex charophyceans. C. Land plants inherited xyloglucans from complex charophyceans. D. Land plants inherited the ability to make cellulose from complex charophyceans. E. Land plants inherited CesA genes from complex charophyceans.
Following the attachment and invasion of a microorganism, in order to be classified as a disease the microorganism must be capable of:
a. causing inflammation and tissue destruc-tion. b. creating pain and requiring antibiotic treatment. c. multiplication and dissemination to deeper tissues. d. killing the resident microbiota.
In general, mammals are not good at dispersing chili plant seeds because
a. the seeds die as they pass through the digestive tract. b. the mammals do not travel very far before they release the chili seeds. c. the chili seeds do not stick to the mammals' fur. d. chili seeds are dispersed mainly by the wind. e. the mammals are the main pollinators for the chili plant.
In meiosis, cells become haploid ____
a. at the end of telophase I b. during metaphase I c. during anaphase I d. at the beginning of metaphase II e. at the end of prophase II