Question: Q: What substances serve as catalysts in most of the biochemical reactions that take place in organisms? Choices: - hormones - carbohydrates - iseotrops - enzymes A:
Answer: enzymes

Question: Q: Dietary proteins are broken down into amino acids during what process? Choices: - accumulation - filtration - photosynthesis - digestion A:
Answer: digestion

Question: Q: What is the term for chordates with a vertebral column and endoskeleton of cartilage and bone? Choices: - am - insect - mammel - vertebrate A:
Answer:
vertebrate