1. a molecule that serves to make reactions work vesicles 2. tiny sacs in the cell that may contain starch enzyme 3. packets within the cell cytoplasm that contain digestive enzymes mitochondria 4. structure within the cell that is responsible for the production of energy golgi apparatus 5. a small structure within the cell that serves specialized functions organelle 6. group of flattened sacs that package and export materials out of the cell plastid 7. tiny sacs connected to the er and golgi apparatus lysosome

1. Enzyme is the molecule that serves to make reactions work. Enzymes are biochemical catalysts that catalyses chemical reactions in a cell by acting on substrates and convert them to products. Their rate of action increases with increase in substrate concentration, reaching optimum when all active sites of the enzyme are engaged.

2. Plastid are the tiny sacs in the cell that may contain starch. Plastid are major cell organelles found in the cells of plants and algae. Plastids are site for the manufacture and storage of important  chemical compounds used by the cell. They often contain pigments used in photosynthesis, and the types of pigments present can change or determine cells color.

3. Lysosome are packets within the cell that contain digestive enzymes. Lysosomes are one of many organelles found in animal cells. they are tiny like sacs filled with enzymes that enables the cell to process nutrients. They contain digestive enzymes which helps in the digestion of worn out organelles, food particles and engulfed viruses or bacteria.

4. Mitochondrion is a structure within a cell that is responsible for production of energy. Energy in a cell is produced through a process of cellular respiration which involves use of nutrients with oxygen gas to yield energy inform of ATP, water and carbon dioxide. The process takes place in the mitochondrion where oxygen acts as proton acceptor in the electron transport chain coupled by production of energy.

5. An Organelle is a small structure that serves specialized functions. A cell is made up of various organelles that help it perform its functions. Each organelle is specialized to perform as specific function different from other organelles, for example ribosomes is an organelle involved in the manufacture of proteins.

6. Golgi apparatus are group of flattened sacs that package and export materials out of the cell. Golgi apparatus also called golgi complex or golgi body, is a membrane bound organelle in eukaryotic cells that is made up by a series of flattened, stacked pouches called cisternae. They are responsible for transporting, modifying, and packaging proteins and lipids into vesicles.

7. Vesicles are tiny sacs connected to the Endoplasmic reticulum and Golgi apparatus. Vesicles are small structures within a cell, or extracellular, consisting of fluid enclosed by a lipid bi-layer. they form naturally during the process of secretion (exocytosis), uptake (endocytosis) and transport of materials within the cytoplasm.

The correct answer will be

1. Enzyme

2. Plastid

3. Lysosome

4. Mitochondrion

5. An Organelle

6. Golgi apparatus

7. Vesicles

Explanation:

1. Enzyme: The chemical structures which catalyse the biological reactions and increasing the rate of reaction by lowering the amount of activation energy.

2. Plastids- the organelle formed which perform different functions in the cell on the basis of which they are given the names like amyloplast store the starch.

3. Lysosome- the organelle which stores the variety of digestive enzymes and marked by the highly acidic conditions.

4. Mitochondria- The double membrane structure associated with the production of energy molecule called ATP which is utilized during the other metabolic process.

5. Organelle- The compartmentalized structures of the cell which perform various functions needed to survive.

6.  Golgi apparatus- The apparatus which is programmed to package and modify the gene expressed products.

7.  Vesicles- the associated structure of the Golgi apparatus and the endoplasmic reticulum in the cell which transports the material to and fro in the endomembrane system.

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