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2
Rollover - Homework Sheet 1
Unlimited
You began on Nov 29, 2021 7:15pm
You must finish this quiz by No particular time
SECTION A- MULTIPLE CHOICE QUESTIONS

100% Complete

SECTION B - SHORT ANSWER SECTION

86% Complete

GLOSSARY

0% Complete

SECTION B - SHORT ANSWER SECTION
Answer the questions on VOS for feedback and marking.

Q1) (2.00 marks)
The information below is required for Question 1-2.

The following electron micrograph shows two rod-shaped bacilli bacteria. When looking at this image, Will said that he could clearly see a cell wall and a nucleus in each bacterial cell. Henry said he was correct with the presence of a cell wall, but there was no nucleus. However, he could not explain the presence of the elongated, oval, light-coloured area in the middle of each cell.

Who was correct, Will or Henry? Explain




Bacteria cells cannot have a nucleus, the oval area was the nucleoid. Hence, Henry was right.
Q2) (1.00 marks)
What name is given to the group to which bacteria and other organisms with such a structure are members?

Prokaryote
Q3) (1.00 marks)
This information is related to Questions 3-7.

Under high magnification, the internal structure of a chloroplast is visible as shown in the diagram:


What process occurs in the chloroplast and requires energy?

photosynthisis
Q4) (2.00 marks)
State the energy source for this process that occurs in the chloroplast, and the name of the pigment that absorbs the energy.

atp energy from the mitachondria - chlorophyll
Q5) (2.00 marks)
Inside the chloroplast, there are many flattened membrane sacs with some interconnecting membranes. This is where one of the main stage of the process occurring in chloroplasts takes place.

What would be the advantage of having many flattened sacs instead of just one big round sac filling much of the space inside the chloroplast?

More surface area for the grana means they can be more effective within their SA'V ratio
Q6) (1.00 marks)
Refer to the diagram of the chloroplast. Region A contains many small organelles called ribosomes that are essential for the functioning of the chloroplast.

What is different about the structure of the ribosomes compared to the structure of the chloroplast?

The ribosome does not have thylakoids while chloroplasts do.
Q7) (2.00 marks)
What important process occur at the ribosomes and how is it beneficial to the process occurring in the chloroplasts?

Ribosomes perform the task of protein synthesis, specific proteins can act as catalysts to speed up the process of photosynthesis in the chloroplast - so the creation of the right types of proteins inherently benefits the chloroplast.
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