A lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles which contain hydrolytic enzymes that can break down many kinds of biomolecules.
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举一反三
- All cells are enclosed by a plasma membrane, which separates the inside of the cell from its environment.
- There is only One RNA polymerase which can transcribe all types of RNA in bacterial cells. Howeve, in animal nucleus there are three different RNA polymerases that transcribe different types of RNA
- Which of the following statements pertaining to the acinar cells<br/>of pancreas is true() A: The nucleus is located at apex of the cells B: The base of the cell is basophilic duo to RER C: The Golgi complex is located on the basal side of the nucleus D: The cells contain mucigen granules E: The secretory granules contain active form of enzymes
- Exercise can convert white fat cells into brown fat cells.
- 中国大学MOOC: Which organelle in an animal cell, in addition to the nucleus, contains genes?
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We can break these nutrients down into 2 sub groups, which are and .
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It can be inferred from the passage that soil composed of silica（） A: does not hold moisture B: is found only in Florida C: nourishes many kinds of ground cover D: provides food for many kinds of lizards
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Nearly all animal mitgratrions happen for one reason only-survival.
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Which "down" is NOT an adverb in the following sentences? A: We're going down a mountain. B: A combined effort can break down the wall of impossibility. C: It is easier to pull down than to build up. D: All men have fears, but the brave put down their fears and go forward.
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Which of the following cells can not be found in the skin? A: Merkel cell B: Kupffer cell C: Langerhans cell D: Melanocyte