What is the arrangement of phospholipids in the plasma membrane

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?

How many bones are there in the human body?

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger