Consumers Digest

Which two processes take place to produce proteins?

4. Which two processes take place to produce proteins? (Points: 1) mitosis and meiosis DNA replication and transcription photosynthesis and cellular respiration transcription and translation 5. Which statement describes a DNA molecule? (Points: 3) It is single stranded. It contains two types of nitrogenous bases. It has a double-helix shape. It is made completely of protein. 17. Two muscles are required to move a bone. What happens inside muscles when they contract? (Points: 3) Calcium combines with ATP to produce sarcomeres. Myosin heads attach to actin-binding sites and pull on actin filaments. Actin produces myosin and ATP. Calcium produces contractions. 23. A biologist is studying a food chain in an ecosystem. In the food chain, wolves eat foxes, the foxes eat rabbits, and the rabbits eat grasses. Which of those four groups of organisms is on the trophic level that holds the least amount of energy? (Points: 3) the grasses the rabbits the foxes the wolves 24. Which statement describes part of the water cycle? (Points: 3) Once water enters the ocean it remains there as saltwater. Water from the atmosphere is transpired by clouds. Plants give off water through transpiration. Water from outer space evaporates and falls to the earth as precipitation. 21. Plants and animals require energy to live. Which statement best describes the difference between the way plants and animals obtain energy? (Points: 3) Both plants and animals absorb food from their surroundings. Plants produce glucose that can be broken down by cellular respiration; animals digest foods to obtain glucose for use in cellular respiration. Producers such as plants do not require a source of energy; animals must consume food for energy. Plants produce ATP during photosynthesis; animals produce ATP during digestion. 25. Which organisms hold the largest amount of energy in most ecosystems? (Points: 3) decomposers producers secondary consumers tertiary consumers

Public Comments

1. 4.DNA replication and transcription 5.It has a double-helix shape 17.Myosin heads attach to actin-binding sites and pull on actin filaments. 23.the wolves 24.Plants give off water through transpiration 21. Plants produce ATP during photosynthesis; animals produce ATP during digestion 25.producers
2. 4. Which two processes take place to produce proteins? (Points: 1) transcription and translation Transcription produces mRNA (and rRNA and tRNA) from DNA, and then translation produces protein from the mRNA. 5. Which statement describes a DNA molecule? (Points: 3) It has a double-helix shape. 17. Two muscles are required to move a bone. What happens inside muscles when they contract? (Points: 3) Calcium produces contractions. NOTE: "Myosin heads attach to actin-binding sites and pull on actin filaments" may sound reasonable, but it's wrong. Myosin heads attach to MYOSIN-binding sites on actin an pull on actin filaments. 23. A biologist is studying a food chain in an ecosystem. In the food chain, wolves eat foxes, the foxes eat rabbits, and the rabbits eat grasses. Which of those four groups of organisms is on the trophic level that holds the least amount of energy? (Points: 3) the wolves 24. Which statement describes part of the water cycle? (Points: 3) Plants give off water through transpiration. 21. Plants and animals require energy to live. Which statement best describes the difference between the way plants and animals obtain energy? (Points: 3) Plants produce glucose that can be broken down by cellular respiration; animals digest foods to obtain glucose for use in cellular respiration. 25. Which organisms hold the largest amount of energy in most ecosystems? (Points: 3) producers