Sovi.AI - AI Math Tutor

Scan to solve math questions
ENFRDEESJAZH-CNZH-TW

QUESTION IMAGE

1. which two statements are true about atoms in the process of cellular…

Question

  1. which two statements are true about atoms in the process of cellular respiration? a. the atoms from photosynthesis products are rearranged, so some energy is lost. b. the types of atoms change during the chemical reaction, producing more energy. c. the atoms in the products are rearranged from the reactants. d. the number and type of atoms stay the same after the chemical reactions. e. the number of atoms increases as energy is produced after the chemical reaction explain your reasoning

Explanation:

Brief Explanations
  • Option A: In cellular respiration, atoms from photosynthesis products (glucose, oxygen) are rearranged. Energy is lost as heat (2nd law of thermodynamics), so A is true.
  • Option B: Atoms don’t change type in chemical reactions (law of conservation of matter), so B is false.
  • Option C: Products (CO₂, H₂O, ATP) come from rearranged reactants (glucose, O₂), so C is true.
  • Option D: The number and type of atoms remain constant (conservation of matter), but D says “stay the same after reactions” which is true, but wait—wait, earlier analysis: Wait, C and D? Wait no, let's recheck. Wait, cellular respiration: reactants (C₆H₁₂O₆ + O₂) → products (CO₂ + H₂O + ATP). Atoms are rearranged (C from glucose to CO₂, H to H₂O, O from O₂ and glucose to CO₂/H₂O). The number and type of atoms (C, H, O) stay the same (conservation of mass). So D is true? Wait, but the question says TWO statements. Wait, maybe I made a mistake. Wait, let's re-express:

Wait, the options:

A: Atoms from photosynthesis products (glucose, O₂) are rearranged, some energy lost. Correct (energy is lost as heat in respiration).

B: Atoms change type? No, chemical reactions don’t change atom types. False.

C: Atoms in products are rearranged from reactants. Correct (reactants are rearranged into products).

D: Number and type of atoms stay same after reactions. Correct (law of conservation of mass—atoms are neither created nor destroyed, just rearranged).

E: Number of atoms increases? No, conservation of mass—number stays same. False.

Wait, but the question says TWO statements. But A, C, D seem true? Wait, maybe the question has a typo, or my analysis is wrong. Wait, let's check again.

Wait, cellular respiration equation: \( C_6H_{12}O_6 + 6O_2
ightarrow 6CO_2 + 6H_2O + ATP \). The number of C, H, O atoms:

  • C: 6 in reactants (glucose), 6 in products (6CO₂) → same.
  • H: 12 in glucose, 12 in 6H₂O (6×2) → same.
  • O: 6 (glucose) + 12 (6O₂) = 18; in products: 12 (6CO₂) + 6 (6H₂O) = 18 → same. So D is true (number and type stay same).

C: Atoms in products are rearranged from reactants. Correct (reactants are glucose and O₂; products are CO₂, H₂O—atoms are rearranged).

A: Atoms from photosynthesis products (glucose is a product of photosynthesis, O₂ is also a product of photosynthesis) are rearranged in respiration, and energy is lost (as heat). Correct (respiration is exothermic, energy is lost as heat).

Wait, but the question says TWO statements. Maybe the intended answers are C and D? Or A and C? Wait, let's check the options again.

Wait, the problem says "Which TWO statements are true". Let's re-evaluate each:

  • A: "The atoms from photosynthesis products are rearranged, so some energy is lost." Photosynthesis products are glucose and O₂, which are reactants in respiration. In respiration, these atoms are rearranged (glucose + O₂ → CO₂ + H₂O). Energy is released, and some is lost as heat (due to entropy). So A is true.
  • B: "The types of atoms change during the chemical reaction, producing more energy." Atoms don’t change type (e.g., C can’t become N). So B is false.
  • C: "The atoms in the products are rearranged from the reactants." In respiration, reactants (glucose, O₂) are rearranged into products (CO₂, H₂O). So C is true.
  • D: "The number and type of atoms stay the same after the chemical reactions." By law of conservation of mass, atoms are conserved (same number and type). So D is true.
  • E: "The number of atoms increases as energy is produced after the chemical reaction." Atoms are conserved, so number doesn’t increase.…

Answer:

C. The atoms in the products are rearranged from the reactants.
D. The number and type of atoms stay the same after the chemical reactions.