Which organelle contains powerful enzymes for digesting cellular waste?
A. Golgi body
B. Ribosome
C. Mitochondrion
D. Lysosome
E. Peroxisome
Answer: D
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Which of the following statements about basidiomycetes and ascomycetes is incorrect?
A. Basidiomycetes have a short heterokaryotic stage, whereas ascomycetes have a long heterokaryotic stage. B. Basidiomycetes produce spores in clubshaped cells, whereas ascomycetes produce spores in elongated, saclike cells. C. Basidiomycetes plug their septal pores following damage in a different way from ascomycetes. D. Basidiomycetes produce four spores from each basidium, whereas ascomycetes produce eight spores from each ascus. E. Basidiomycete fruiting bodies are composed entirely of dikaryotic hyphae, whereas ascomycete fruiting bodies are composed of a combination of haploid and dikaryotic hyphae.
The Mitchison and Kirschner ________ model of how microtubules transition between periods of growth and catastrophe proposes that ________ bound to ?-tubulin subunits at a microtubule plus end stabilizes the end and promotes growth,
but if the rate of hydrolysis to ________ exceeds the rate of tubulin addition, the end becomes unstable and loses subunits. Fill in the blank with correct word.
The units of inheritance, called ________, are segments of the DNA of a chromosome, ranging from a few hundred to many thousands of nucleotides in length
Fill in the blank(s) with correct word
This form of carbon results from cell respiration.
A) Producers B) Carbon dioxide C) Transpiration D) limestone