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G9 Chap 9.1 Cellular Growth

G9 Chap 9.1 Cellular Growth

Assessment

Presentation

Biology

9th Grade

Easy

NGSS
HS-LS1-4, HS-LS1-2, HS-LS3-1

Standards-aligned

Created by

Karen Lolli

Used 49+ times

FREE Resource

8 Slides • 9 Questions

1

Cellular Growth

Chapter 9 Section 1

2

Lesson Objectives

Why are cells small?

What are the stages of the cell cycle?

What are the stages of interphase?​

3

Multiple Choice

Question image

A large animal, such as an elephant, has bigger sized cells compared to a smaller animal, such as a mouse

1

True

2

False

4

Cell Size

  • Cells are SMALL!

  • Key factor - The ratio of surface area of the cell membrane to the volume inside the cell

  • A high ratio = good

    • A lot of surface area and small volume inside

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5

Cell Size

  • If cell grows too large, processes slow down

    • Transport of substances (nutrients in/waste out)

    • Cell communication

  • Cells will divide before they become too large

    • Maintains small size

    • Creates new cells

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6

Multiple Select

MULTI-SELECT

What happens if cell size becomes too large?

1

difficult to transport substances

2

cell communication is slower

3

difficult to move nutrients and waste

4

processes happen faster

7

Forms of DNA

  • Chromosomes

    • Structures in the nucleus that contain of genetic material (DNA)

      • Tightly wrapped up form of DNA

  • Chromatin

    • Relaxed, unwrapped form of DNA

  • Humans have 46 chromosomes

    • Other organisms have different # of chromosomes

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8

Cell Cycle

There are 3 main stages of the Cell Cycle

Stage 1 - Interphase (normal cell activities)

  • 3 sub-stages

    • G1 - Gap 1 (cell grows, performs normal functions)

    • S - Synthesis (chromosomes are copied)

    • G2 - Gap 2 (cell prepares to divide)​

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9

Multiple Choice

Question image

Structures in the nucleus, where genetic information (DNA) is found

1

chromosomes

2

chloroplasts

3

cytoplasm

4

cell membrane

10

Multiple Choice

In which sub-stage of Interphase does the cell copy DNA?

1

G1

2

S

3

G2

11

Multiple Choice

In which sub-stage of Interphase does the cell grow and perform normal cell functions?

1

G1

2

S

3

G2

12

Multiple Choice

In which sub-stage of Interphase does the cell prepare to divide?

1

G1

2

S

3

G2

13

Cell Cycle

Stage 2 - Mitosis (nucleus divides)

  • 4 sub-stages PMAT

    • Prophase

    • Metaphase

    • Anaphase

    • Telophase​

​Stage 3 - Cytokinesis (cytoplasm divides) = 2 new cells

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14

Multiple Choice

During mitosis, the _____________ divides

1

nucleus

2

cyotplasm

3

cell membrane

15

Multiple Choice

During cytokinesis, the ___________ divides

1

nucleus

2

cytoplasm

3

DNA

16

Multiple Choice

After Cytokinesis, there are _______ cells

1

1

2

2

3

3

4

4

17

Cellular Growth

Chapter 9 Section 1

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