Which statements about active transport are correct? 1. Molecules move from high to low concentration. 2. Molecules move from lower to high concentration. 3. Energy is required.

Here are the solutions for the questions from the image: 25. During active transport: 1. Molecules move from a region of high concentration to a region of low concentration 2. Molecules move from a region of lower concentration to a region of high concentration 3. Energy is required Statement 1: This describes passive transport (diffusion), where molecules move down their concentration gradient. This is incorrect for active transport. Statement 2: Active transport moves molecules against their concentration gradient, from an area of lower concentration to an area of higher concentration. This is correct. Statement 3: Active transport requires an input of energy, typically from ATP, to move molecules against their concentration gradient. This is correct. Therefore, statements 2 and 3 are correct. SECTION IV Questions 26 – 30 For these questions, I will evaluate each statement as True (T) or False (F). 26. First statement: Photosynthesis occurs only during the day. This statement is True. The light-dependent reactions of photosynthesis require sunlight, which is available during the day. Second statement: Chlorophyll absorbs solar energy in sunlight. This statement is True. Chlorophyll is the primary pigment responsible for absorbing light energy during photosynthesis. 27. First statement: Yeast cells carry out fermentation. This statement is True. Yeast cells are facultative anaerobes that perform alcoholic fermentation in the absence of oxygen. Second statement: Ethanol is a product of anaerobic respiration in breweries. This statement is True. Ethanol is a key product of yeast fermentation, which is utilized in brewing. 28. First statement: Nitrogen fixing bacteria converts soil nutrients to atmospheric nitrogen. This statement is False. Nitrogen-fixing bacteria convert atmospheric nitrogen* (N_2) into ammonia (NH_3), which is then used to form soil nutrients. The conversion of soil nutrients to atmospheric nitrogen is called denitrification. Second statement: Nitrogen fixation is either done aerobically or anaerobically. This statement is True. Nitrogen fixation can be carried out by both aerobic bacteria (e.g., Azotobacter) and anaerobic bacteria (e.g., Clostridium), as well as symbiotic bacteria like Rhizobium* that operate in low-oxygen conditions. 29. First statement: During very cold weather, the erector pilli muscles contract and cause the hair on the body to stand erect. This statement is True. The contraction of erector pili muscles causes hairs to stand up, trapping a layer of air for insulation to reduce heat loss. Second statement: During cold weather there is increase in metabolic activities which causes more blood supply to the skin surface. This statement is False. During cold weather, metabolic activities increase to generate heat, but blood flow to the skin surface decreases* (vasoconstriction) to conserve heat, not increase it. 30. First statement: Plants are autotrophic. This statement is True. Autotrophic organisms produce their own food, typically through photosynthesis, which plants do. Second statement: Plants always occupy the first trophic level in an ecosystem. This statement is True. As producers, autotrophic plants form the base of the food chain and thus occupy the first trophic level. 31. An example of a joint The description for this question is missing from the image, so it cannot be answered. 32. A feeding relation organisms in which other neither ben This incomplete description refers to a symbiotic relationship where one organism benefits, and the other is neither helped nor harmed. The correct option is A. Commensalism. 33. Provides turn The question is incomplete, so it cannot be answered. 34. The question is incomplete, so it cannot be answered. 35. The question is incomplete, so it cannot be answered. Send me the next one 📸