PAX PAX Biology 1 — Questions and Answers
Question 1: Which organelle is known as the 'powerhouse of the cell'?
- Ribosome
- Nucleus
- Mitochondria (Correct answer)
- Golgi apparatus
Correct answer: Mitochondria
Mitochondria produce ATP through cellular respiration, providing the cell with energy.
Question 2: What is the function of red blood cells (erythrocytes)?
- Fight infection
- Transport oxygen (Correct answer)
- Produce antibodies
- Aid in clotting
Correct answer: Transport oxygen
Red blood cells contain hemoglobin, which binds oxygen and transports it throughout the body.
Question 3: Which type of cell division produces gametes (sex cells)?
- Mitosis
- Binary fission
- Meiosis (Correct answer)
- Budding
Correct answer: Meiosis
Meiosis is the specialized cell division that produces haploid gametes (sperm and eggs) with half the normal chromosome number.
Question 4: What is the role of DNA in a cell?
- Supply energy
- Store genetic information (Correct answer)
- Produce hormones
- Transport nutrients
Correct answer: Store genetic information
DNA stores the genetic blueprint that directs the synthesis of proteins and controls cell functions.
Question 5: Which of the following is NOT a function of the liver?
- Detoxification
- Production of bile
- Pumping blood (Correct answer)
- Glucose storage
Correct answer: Pumping blood
Pumping blood is the function of the heart; the liver detoxifies, produces bile, and stores glycogen.
Question 6: What type of tissue covers body surfaces and lines internal organs?
- Muscle tissue
- Connective tissue
- Epithelial tissue (Correct answer)
- Nervous tissue
Correct answer: Epithelial tissue
Epithelial tissue forms the outer covering of the body and the lining of internal cavities and organs.
PAX PAX Biology 1
Which organelle is known as the 'powerhouse of the cell'?