- Pl Ex 02 02 Answer All Parts I Carbohydrates Proteins And Fats Are Major Types Of Biological Molecules That Make Up 1 (74.5 KiB) Viewed 15 times
PL/EX/02 02. Answer all parts. i. Carbohydrates, Proteins and Fats are major types of biological molecules that make up living organisms. a. Write two characteristics displayed by ALL living organisms. b. Name the Disaccharide that acts as the storage sugar in milk. e. Name the Monosaccharide units that constitute the sugar mentioned in (b). (2 marks) d. Name the linkage/ bond between monosaccharide units in forming the sugar mentioned in (b). (1 mark) e. Name the structural polysaccharide present in the exoskeleton of the animal shown in Figure 2. (1 mark) f. Name the basic subunit of proteins shown in Figure 3. Figure 2. H H-N-C-C-OH R Side Chain Figure 3. Amino Group g. Write two major functions of proteins in the human body. (2 marks) (1 mark) Carboxyl Group Source Sink Cellular Respiration (1 mark) ii. Gas exchange occurs in plants through Cellular Respiration and Photosynthesis. a. What is the primary structure in plants through which gas exchange occurs? (1 mark) b. Give two major differences between Cellular Respiration and Photosynthesis in plants. (4 marks) Photosynthesis Example REV:00/00.00.0000 (1 mark) c. Name two other specialized plant structures involved in the gas exchange in plants, giving the location of each structure. (2 marks) Specialized structure Plant body part/location in the plant d. Explain what is meant by "Parasitic Nutrition" in plants? Give one example of a parasitic plant. (2 marks) iii. Xylem and Phloem in plants are permanent tissues derived from plant meristems. a. List the two most important characteristics of stem cells. (2 marks) b. What is the mechanism by which water enters into the xylem of roots from the soil? e. Define the term "Transpiration Pull". d. Identify Sources and Sinks involved in phloem translocation. Give one example each. (2 marks) (1 mark) (2 marks) (Total 25 Marks)