OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They release nitrogen.
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They take in nutrients.
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They move around in the body.
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They produce oxygen and carbon dioxide.
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Detailed explanation-1: -Glucose and other food molecules are broken down by controlled stepwise oxidation to provide chemical energy in the form of ATP and NADH.
Detailed explanation-2: -Cells, like humans, cannot generate energy without locating a source in their environment. However, whereas humans search for substances like fossil fuels to power their homes and businesses, cells seek their energy in the form of food molecules or sunlight.
Detailed explanation-3: -Using a process called endocytosis, cells ingest nutrients, fluids, proteins and other molecules. An international team of researchers recently revealed new details about endocytosis, an activity that, when it malfunctions, can lead to diseases such as muscular dystrophy, Alzheimer’s and leukemia.
Detailed explanation-4: -Cells Obtain Energy by the Oxidation of Organic Molecules All animal and plant cells are powered by energy stored in the chemical bonds of organic molecules, whether these be sugars that a plant has photosynthesized as food for itself or the mixture of large and small molecules that an animal has eaten.