Where in the chloroplast is the pH the lowest?
What will be an ideal response?
Answer: Within the thylakoid space inside the thylakoid membrane sac.
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The exoskeleton of insects is composed mainly of what material?
A. chitin B. calcium carbonate C. hydroxyapatite D. collagen E. waxes
Which hypothesis was tested by Warren and Marshall during their research involving Helicobacter pylori bacteria and stomach ulcers?
A) Eating spicy food increases populations of H. pylori in the stomachs of people susceptible to ulcers. B) The cause of many stomach ulcers is the bacterium H. pylori, not spicy food. C) Stomach acid production is decreased by H. pylori bacteria in the stomachs of people with ulcers. D) Acute stomach pain is often caused by H. pylori bacteria, not ulcers.
Proteolytic processing, chemical modification, and protein degradation are all methods of posttranslational regulation
mechanism. Indicate whether the statement is true or false.
What is the correct sequence for the start of an organism's life cycle?
A) fertilization ? meiosis ? zygote ? embryo
B) meiosis ? fertilization ? zygote ? embryo
C) fertilization ? zygote ? meiosis ? embryo
D) meiosis ? fertilization ? embryo ? zygote