DAT Practice Test (Survey of Natural Sciences) 2 — Questions and Answers
Question 1: Which organelle is the primary site of ATP production in eukaryotic cells?
- Mitochondria (Correct answer)
- Ribosome
- Golgi apparatus
- Lysosome
Correct answer: Mitochondria
Mitochondria generate most cellular ATP through oxidative phosphorylation.
Question 2: In glycolysis, glucose is converted into two molecules of which compound?
- Pyruvate (Correct answer)
- Acetyl-CoA
- Lactate
- Citrate
Correct answer: Pyruvate
Glycolysis splits one glucose into two pyruvate molecules.
Question 3: What is the hybridization of the carbon atom in carbon dioxide (CO2)?
- sp (Correct answer)
- sp2
- sp3
- sp3d
Correct answer: sp
CO2 is linear with two regions of electron density, giving sp hybridization.
Question 4: Which of the following is a strong acid?
- HCl (Correct answer)
- CH3COOH
- H2CO3
- HF
Correct answer: HCl
Hydrochloric acid fully dissociates in water, making it a strong acid.
Question 5: During meiosis, genetic diversity is increased by crossing over during which phase?
- Prophase I (Correct answer)
- Metaphase II
- Anaphase II
- Telophase I
Correct answer: Prophase I
Homologous chromosomes exchange segments during prophase I.
Question 6: Which subatomic particle determines the identity of a chemical element?
- Proton (Correct answer)
- Neutron
- Electron
- Positron
Correct answer: Proton
The number of protons (atomic number) defines the element.
Question 7: What type of bond holds the two strands of DNA together?
- Hydrogen bonds (Correct answer)
- Peptide bonds
- Ionic bonds
- Disulfide bonds
Correct answer: Hydrogen bonds
Complementary bases pair via hydrogen bonds between the strands.
DAT Practice Test (Survey of Natural Sciences) 2
Which organelle is the primary site of ATP production in eukaryotic cells?