1. Which enzyme is responsible for unwinding the DNA double helix during DNA replication?
2. What is the primary acceptor of \(CO_2\) in \(C_4\) plants during photosynthetic carbon fixation?
3. Which functional unit of the human kidney is responsible for ultrafiltration of blood?
4. During cellular respiration, what is the net yield of ATP molecules produced per molecule of glucose in glycolysis alone?
5. Which immunoglobulins (antibodies) are primarily present in human colostrum to provide passive immunity to newborns?