Unit 2 Lesson 1

Question 1

DNA

Answer 1

Deoxyribonucleic acid is the genetic material in cells. Contains instructions for growth, developments and activities. Contains the information that determines an organism’s traits

Question 2

Chromosome

Answer 2

One of the structures in the nucleus made of DNA and protein . Consists of 2 identical structures called chromatids held together by a centromere

Question 3

Cell cycle

Answer 3

The life cycle of a eukaryotic cell.

Divided into 3 stages: interphase, mitosis , and cytokinesis

Question 4

Interphase

Answer 4

The part of the cell cycle where the cell is not dividing. The cell grows and produces organelles and carries out other normal life activities

** The DNA is duplicated during this stage

Question 5

Mitosis

Answer 5

The part of the cell cycle during which the nucleus divides into 2 identical nuclei

Chromosomes condense from chromatin

Question 6

Cytokinesis

Answer 6

The stage when the cytoplasm divides . Begins during the last step of mitosis

In plant cells which have a cell wall, a cell plate forms. The cell plate becomes cell membranes

Question 7

What are the phases of mitosis?

Answer 7

Prophase - the chromatin in the nucleus condenses and becomes visible under the microscope

Metaphase - chromosomes line up in the middle of the cell

Anaphase - the chromatids separate and are pulled to the opposite sides of the cell

Telophase - a new nuclear membrane forms around each group of chromosomes