LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Human cells need food, but plant cells do not.
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Human cells need energy, but plant cells do not.
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Plant cells make their own food, but human cells do not.
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Plant cells make their own energy, but human cells do not.
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Detailed explanation-1: -Both animal and plant cells have mitochondria, but only plant cells have chloroplasts. Plants don’t get their sugar from eating food, so they need to make sugar from sunlight. This process (photosynthesis) takes place in the chloroplast.
Detailed explanation-2: -Humans cannot make their own food because we do not have things that plants have such as chlorophyll. The carbon dioxide and water are transformed into a totally new substance that contains energy–it is food in the form of sugar.
Detailed explanation-3: -Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane. Plants use cell walls to provide structure to the plant. Plant cells contain organelles called chloroplasts, while animal cells do not.
Detailed explanation-4: -1. A plant cell is surrounded by a rigid cell wall. 1. An animal cell does not have a cell wall.
Detailed explanation-5: -Among all multicellular organisms, only plants have the ability to convert sunlight into organic substances via photosynthesis and are therefore able to live a more or less independent life, whereas all other organisms, including humans, fully depend on plants as primary producers of both food and oxygen.