Question

29. Based on the endosymbiont theory which was once a free living prokaryote? A. Chloroplast B. Golgi C. Lysosome D. rough endoplasmic reticulum E. B and D 30. Exporting large substances out of the cell can be accomplished by A. exocytosis B. facilitated diffusion C. endocytosis D. osmosis 31. Lipase is an enzyme which breaks down A. Sugar B. Proteins C. DNA D. Fats 32. Which is not true of the plasma membrane? A. Composed of triglycerides B. Has proteins integrated in it C. Is continually recycled D. is part of the endomembrane system E. B and C 33. Which is not a mechanism to regulate enzyme activity? A. competitive inhibition B. feedback inhibition C. non-competitive inhibition D. prohibition 34. Which would not be found in a prokaryote? A. DNA B. plasma membrane C. cytoplasm CD D. Ribosome E. A, B, 35. Non-competitive inhibition of enzymes involves A. binding to the active site B. binding to a second site function C. increasing enzyme 36. Moving vesicles across a cell is an example of A. Chemical work B . Pilates C. Transport work work D. Mechanical 37. Synthesizing proteins from amino acids is an example of

Answer 1

29. Chloroplast

According to endosymbiotic theory, mitochondria and chloroplast have originated from prokaryotic ancestors. A prokaryotic organism capable of performing aerobic respiration evolved into mitochondria and the one capable of performing oxygenic photosynthesis evolved into chloroplast.

30. A

Large molecules can be exported out of the cell by the process of exocytosis and small molecules can be imported by the process of endocytosis.

Facilitated diffusion is the process by which molecules move across the surface of the cell with the help of protein Carriers along concentration gradient.

Osmosis is the process of movement of solvent molecules along concentration gradient.

31. Fats

Sugars are broken down by enzymes called as glycosidases. Nucleic acids are broken down by enzymes called as nucleases and proteins are broken down by proteases and peptidases.

32. D

Endomembrane system is the system of different membranes present inside cell all of which participate in transportation and Packaging of molecules. These molecules can be transported within the cell or outside the cell. It is developed mainly in eukaryotes because they contain membrane of Mitochondria, chloroplast, nucleus, Golgi apparatus, endoplasmic reticulum, vesicles, lysosomes, vacuoles etc.

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