Question

The original energy for photosynthesis to begin comes from:(1 point)

A. water molecules
B. light
C. carbon dioxide molecules
D. ATP
Answer
Consider the reactants and products of cellular respiration. Which equation best models the process?(1 point)
Responses

water + carbon dioxide + energy → glucose + water
water + carbon dioxide + energy → glucose + water

water + carbon dioxide → glucose + oxygen + energy
water + carbon dioxide → glucose + oxygen + energy

glucose + oxygen → water + carbon dioxide + energy
glucose + oxygen → water + carbon dioxide + energy

glucose + oxygen + carbon dioxide → water + energy
Answer
In the Krebs cycle, how is citric acid formed?(1 point)
Responses

Enzymes combine hydrogen ions, oxygen, and electrons.
Enzymes combine hydrogen ions, oxygen, and electrons.

Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.

Carbon dioxide bonds with a chain of coenzyme A.
Carbon dioxide bonds with a chain of coenzyme A.

Pyruvic acid molecules are broken down by an acetyl group.
Answer
Which molecule provides the activation energy that starts glycolysis? (Not which molecule is broken down during glycolysis)(1 point)
Responses

sugar
sugar

water
water

ATP
ATP

carbon dioxide
Answer
During which phase of cellular respiration is carbon dioxide released?(1 point)
Responses

electron transport chain
electron transport chain

glycolysis
glycolysis

Krebs cycle
Krebs cycle

digestion
Answer
How can Gram staining be used to identify how some bacteria respond to their environmental conditions?(1 point)
Responses

Gram staining helps scientists visualize bacterial antibiotic resistance.
Gram staining helps scientists visualize bacterial antibiotic resistance.

Gram staining helps scientists visualize the thickness of bacteria.
Gram staining helps scientists visualize the thickness of bacteria.

Gram staining helps scientists visualize structures that aid bacterial motility.
Gram staining helps scientists visualize structures that aid bacterial motility.

Gram staining helps scientists visualize the composition of bacterial cells.
Answered by GPT-4o mini
The original energy for photosynthesis to begin comes from:

B. light
Answered by GPT-4o mini
The equation that best models the process of cellular respiration is:

**glucose + oxygen → water + carbon dioxide + energy**

This indicates that glucose and oxygen are the reactants, and they are converted into water, carbon dioxide, and energy (in the form of ATP).
Answered by GPT-4o mini
In the Krebs cycle, citric acid is formed when:

**Acetyl-CoA joins with a large molecule called oxaloacetic acid.**

This reaction initiates the Krebs cycle, resulting in the formation of citric acid (also known as citrate).
Answered by GPT-4o mini
The molecule that provides the activation energy that starts glycolysis is:

**ATP**
Answered by GPT-4o mini
Carbon dioxide is released during the:

**Krebs cycle**
Answered by GPT-4o mini
Gram staining helps scientists visualize the composition of bacterial cells.