|
Previous
2.5 Summary
|
Next
3.1 Overview
|
Examine the three images below. Use calculations Explain which organism would be the smallest when viewed with the naked eye. Show all the calculations you used to arrive at your answer.
\(\text{A} = \frac{4}{40} = \text{0,1}\text{ mm}\)
\(\text{B} = \frac{\text{1,6}}{100} = \text{0,016}\text{ mm}\)
\(\text{C} = \frac{\text{0,4}}{400} = \text{0,001}\text{ mm}\)
So item C would be the smallest
Below is a three-dimensional diagram of the cell. Provide the name and function of the following numbered structures:
The following difficult to distinguish structures have been done for you:
4-vesicle: spherical sacs that facilitate storage, metabolism and transport of molecules.
7-cell membrane: selectively permeable to control the passage of substances into and out of the cell.
10-vacuole: storage of sugars, minerals and pigments and help maintain water balance in the cell.
12-lysosome: contain powerful digestive enzymes that digest damaged cell structures and food molecules.
1-Nucleolus: site of the transcription of RNA.
2-Nucleus: controls metabolism of the cell and contains hereditary information.
3-Ribosome: site of protein synthesis.
5-Rough endoplasmic reticulum: many ribosomes therefore allowing for the production of many proteins.
6-Golgi body: modify and package proteins and send them where they are needed int he cell.
8-Smooth endoplasmic reticulum: the synthesis of lipids and the detoxification of drugs.
9-Mitochondrion: the site of cellular respiration where energy is released from glucose molecules.
11-Cytoplasm: jelly-like substance that contains all the organelles and which contains dissolved nutrients.
12-Centriole: special structures that help cells to divide during mitosis.
Multiple answers are provided for each question. Write only the letter of the correct answer next to the corresponding number.
Active transport is the movement of a substance from a:
Protoplasm consists of:
This organelle is responsible for transporting substances around the cell:
The nucleus does not control:
The energy that a molecule possesses while moving:
Which of the following is not a product of cellular respiration?
Give the correct biological term for each of the following. Write only the term next to the relevant question number.
Part of the cell that consists of about \(\text{90}\%\) water.
Often referred to as the powerhouse of the cell.
Pigment found in green plants.
The part of a plant cell that is composed of cellulose.
The fluid inside the vacuole.
The movement of a substance against a concentration gradient.
The structure that distributes substances made in the cell.
Choose the correct option for each of the following questions. Write only the term next to the relevant question number.
What structure contains DNA and regulates most of the processes within the cell?
What is a cell membrane?
Which two organelles contain their own DNA genome, separate from the nuclear genome?
Tabulate four differences between animal and plant cells.
Any four of the following:
| Animal Cells | Plant Cells |
| Do not contain plastids. | Almost all plants cells contain plastids such chloroplasts, chromoplasts and leucoplasts. |
| No cell wall. | Have a rigid cellulose cell wall in addition to the cell membrane. |
| Contain centrioles. | Do not contain centrioles. |
| Animals do not have plasmodesmata or pits. | Contain plasmodesmata and pits. |
| Few vacuoles (if any). | Large central vacuole filled with cell sap in mature cells. |
| Nucleus is generally found at the centre of the cytoplasm. | Nucleus is found near the edge of the cell. |
| No intercellular spaces found between the cells. | Large intercellular air spaces found between some cells. |
Name a structural adaptation of the mitochondria that makes it suited to its function:
Name one structural adaptation of chloroplasts.
|
Previous
2.5 Summary
|
Table of Contents |
Next
3.1 Overview
|
