Question

11

Students placed yeast cells into a test tube. They added sugar solution to the test tube and
placed a rubber stopper on the end. They left the test tube at room temperature to examine
the next day. Students researched yeast and discovered that yeast are single-celled fungi that
contain many mitochondria, but chloroplasts are absent. The teacher asks students to form a
hypothesis to address the experimental question, "What gas will the yeast produce in the test
tube over the next 24 hours?"
Based on this information, what hypothesis is valid?
A Carbon dioxide will be produced due to cellular respiration.
B Carbon dioxide will be produced due to photosynthesis.
C Oxygen will be produced due to cellular respiration.
D Oxygen will be produced due to photosynthesis.
SIA

Answer 1

The correct option is A. Carbon dioxide will be produced due to cellular respiration.

Step-by-step explanation:

Respiration can be described as a process in which sugars are converted into carbon dioxide and water. As the children discover that yeast cells lack chloroplast, hence they got the idea that yeast cells do not carry out photosynthesis. The children also observed that the yeast cells have abundance of the organelle, mitochondria. As mitochondria are the sites where cellular respiration takes place hence the children got the idea that yeast carries out cellular respiration and carbon dioxide is produced as a result of it.