"Cell Proliferation" Cell Life Process PPT Download

"Cell Proliferation" Cell Life Process PPT Download

The first part of the content: Independent preview plan before class

1. Cell proliferation and cell cycle

1. cell proliferation

(1) The process by which cells increase cell _____ through _____ is called cell proliferation.

(2) Cell proliferation includes two consecutive processes of _____ and _____.

(3) Eukaryotic cells divide in three ways: _____, amitosis and _____.

(4)_____ is an important cell life activity and the basis for the growth, _____, reproduction, and _____ of organisms.

2. cell cycle

2. Mitosis of higher plant cells

1. interphase

(1)Main changes

① Complete the synthesis of _____ and related _____

②Moderate cell growth

(2)Meaning: Active material preparation for _____.

2. division period

1. Decide whether the following statements are true or false

(1) In the cell cycle, the duration of the interphase is usually shorter than the duration of the mitosis ()

(2) The cell cycle duration of all cells in the human body is the same ()

(3) To observe the shape and number of chromosomes in cells, it is best to choose cells in the metaphase of mitosis ()

(4) During the process of mitosis, the number of chromosomes in the cell changes regularly ()

2. During interphase, cell division does not occur ()

A. Double the amount of DNA B. Massive increase in protein

C. Double the number of chromosomes D. Cell shape changes from small to large

Analysis: During the interphase of cell division, the replication of DNA molecules and the synthesis of related proteins are mainly carried out, and at the same time, the cells grow moderately. Two sister chromatids appear in each chromosome. During anaphase, the number of chromosomes changes due to centromere division.

Answer: C

3. During cell mitosis, DNA replication, centromere division, sister chromatid formation and disappearance occur sequentially in ()

A. interphase, anaphase, interphase, anaphase

B． interphase, anaphase, metaphase, anaphase

C. interphase, anaphase, telophase, anaphase

D. Early stage, middle stage, late stage, final stage

Analysis: During cell mitosis, DNA replication occurs in interphase, centromere division occurs in anaphase, and sister chromatids are formed in interphase and disappear in anaphase.

Answer: A

Cell Proliferation PPT, Part 2 Content: Classroom Interactive Research Case

【Course Standards】

Describes the different ways cells divide, among which mitosis ensures the consistency of genetic information in parent and daughter cells

[Achievement of quality]

1. Understand and explain the concept and significance of cell proliferation. (concept of life)

2. Combined with Figure 6-1 on page P111 of the textbook, understand the concept and segmentation of the mitotic cell cycle. (scientific thinking)

3. Understand the changes in chromosomes and DNA during plant cell mitosis. (scientific thinking)

4. Combined with Figures 6-2 and 6-3 of the textbook, master the process of plant cell mitosis and outline the main change characteristics of each stage. (scientific thinking)

Research point 1: Cell proliferation and cell cycle

【Teacher's Guidance】

1. Determine whether the following cells have a cell cycle and explain why.

① Root apical meristematic zone cells ② Embryonic stem cells ③ Skin germinal layer cells

④Nerve cells ⑤Cambium cells of stem

Answer: ①②③⑤ There is a cell cycle, and they are all cells that divide continuously; ④ They are highly differentiated cells that no longer divide and have no cell cycle.

2. The following table shows the duration of the cell cycle of several types of cells, analyzed according to the table:

Cell type Interphase Division phase Cell cycle

Broad bean root apical meristem cells 15.3 2.0 17.3

Mouse duodenal epithelial cells 13.5 1.8 15.3

Human liver cells 21 1 22

Human cervical cancer cells 20.5 1.5 22

(1) What characteristics do these cells have in common?

(2) Are the cell cycle durations of different organisms the same? Do different cells of the same organism have the same cell cycle duration?

Cell proliferation PPT, the third part: [Backbone implementation]

1. The reasons that limit the ability of cells to grow indefinitely are: ①The ratio of cell surface area to volume; ②The relative ratio of cell nucleus to cytoplasm.

2. The larger the cell volume, the smaller the relative surface area, and the lower the material transport efficiency.

3. Only cells that divide continuously have a cell cycle, such as cells in the root apical meristematic zone and cells in the germinal layer of the skin.

4. Memory formula for the main characteristics of each stage of mitosis: duplication and synthesis in interphase, the membranous core disappears and appears in two bodies in the early stage, the number of cleavages in the middle stage is clear and the equator is aligned, the number of cleavages in the late stage is added to both poles, and the telophase is restarted with two eliminations and two appearances.

5. In mitosis, DNA doubles during interphase and chromosome number temporarily doubles during anaphase.

6. Organelles related to mitosis in higher plant cells include ribosomes, Golgi apparatus, mitochondria, etc.

Keywords: PPT courseware for high school biology compulsory course 1 from the People's Education Press is available for free download, cell proliferation PPT download, cell life course PPT download, .PPT format;

For more information about the PPT courseware "Life Course of Cells and Proliferation of Cells", please click on the Life Course of Cells ppt Cell Proliferation ppt tag.

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