BIO- / Week 2 / Exam 1

blank) _ occurs when protein structure changes due to high heat. Select one: a. Denaturation ! b. Saturation c. Synthesis d. Dehydration e. Hydrolysis The correct answer is: Denaturation What molecule can ionize and release hydrogen ions to make the solution more acidic? Select one: a. carbonyl " b. phosphate c. sulfhydryl d. carboxyl e. hydroxyl The correct answer is: carboxyl Page 1 of 18 Question 3 Correct Mark 2.50 out of 2.50 Question 4 Correct Mark 2.50 out of 2.50 Question 5 Correct Mark 2.50 out of 2.50 Why is sickle cell disease more common in Americans with African ancestors than Americans with European ancestors? Select one: a. Sickle-shaped blood cells caused malarial parasites to die, and thus gave protection against malarial infections prevalent in Africa ! b. Sickle-shaped blood cells were good hosts for tuberculosis, and thus spread tuberculosis widely throughout Africa c. Sickle-shaped blood cells caused cholera bacteria to die, and thus gave protection against large-scale cholera epidemics throughout Europe d. Sickle-shaped blood cells caused tuberculosis bacteria to die, and thus gave protection against large-scale Tb epidem