Part 3: What's yeast "dough" ing in my bread? by GEB

Reading resources

moe_gebr — 2025-07-22 06:15:00 UTC

Click on the link below to learn about the life cycle of yeast cell.

Yeast in Action (Enrichment) Part 1

moe_gebr — 2025-07-22 06:15:00 UTC

Click on the link below to:

Explore yeast structure and functions
Learn how alcohol and iodine affects yeast.

Yeast in Action (Enrichment) Part 2

Real-world connections-Making better bread

moe_gebr — 2025-07-22 06:15:00 UTC

Why do bakers knead dough?
What makes some breads fluffier than others?

Microbes talk

moe_gebr — 2025-07-22 06:15:00 UTC

What if we could see microbes with our eyes — what do you think they look like?
Can you name some food that are made using microbes?

Upload your work here

moe_gebr — 2025-07-22 06:15:00 UTC

Click the 💬 comment button to add your work.
Write your name and a short title.
Upload one file only (photo or document).

Your task:

moe_gebr — 2025-07-22 06:19:40 UTC

Investigate whether common preservatives (salt, cinnamon, or turmeric) affect yeast’s ability to make dough rise. Choose one preservative (salt, cinnamon, or turmeric) to test in your experiment.

Steps:

To a container with 30 ml of warm water, add

1 tsp of sugar
50 g of flour (any type you have at home)
1 tsp of yeast
a pinch of salt/cinnamon or turmeric (choose only 1)

Mix the ingredients thoroughly, cover the container and leave it for 30 minutes.

Observe and Reflect:

What happened to the dough after 30 minutes?
Did the yeast die?
What conditions helped the dough rise?

Record your observations and share in the next column.

* If you plan to bake the dough, please consult an adult on other ingredients from your family’s recipe and steps for proofing bread. Be safe.

moe_gebr — 2025-07-22 08:28:01 UTC

In your previous experiment, you tested how ingredients like salt, cinnamon, and turmeric affected mold growth on rice. These ingredients acted as natural preservatives by slowing down or stopping the growth of harmful microbes.

Now, you will explore how these same ingredients affect yeast, a beneficial microbe used in baking. Yeast helps dough rise by producing gas during fermentation. If salt, cinnamon, and turmeric can prevent mold growth, could they also affect yeast? And if so, how might they interfere with yeast’s ability to make dough rise?