Problem: OPTIONS:
- disulfide bridges
- hydrogen bonds
- ionic bonds
- peptide bonds
Q: Q: Protein digestion begins in the stomach as pepsinogen in gastric juice is converted to pepsin, the enzyme that hydrolyzes this? A:
Answer: peptide bonds

Problem:OPTIONS:
- veins
- pores
- capillaries
- arteries

Q: What carries blood away from the heart? A:
****
A: arteries

Q: What are the two components of the autonomic nervous system? A:
OPTIONS:
- empathetic and sympathetic
- crystallisation and sympathetic
- neurons and sympathetic
- parasympathetic and sympathetic
parasympathetic and sympathetic

Q: In an experiment, what is kept constant so they will not affect the results, including affecting the dependent variable? A:
OPTIONS:
- atmospheric controls
- similar controls
- educated controls
- experimental controls

Answer: experimental controls

Question: Q: Which state of matter has the lowest density? A:
OPTIONS:
- liquids
- fluids
- solids
- gases
Answer: gases

input: OPTIONS:
- carbon
- helium
- nitrogen
- oxygen Now, answer this question: Q: Lactic acid fermentation is common in muscle cells that have run out of what? A:
A:
output:
oxygen