Biology

Assignment:

Class: 10

Week: 17^th – 22^nd March

Chapter: Structure of Chromosomes: Cell Cycle and Cell Division

Content:

· Learn the chapter from your textbook (Concise Biology).

· Go through the YouTube videos as given in the links below.

Video links:

· https://youtu.be/RA9n0Enu5Gw (DNA structure and Function)

· https://youtu.be/C1CRrtkWwu0 (DNA structure)

· https://youtu.be/5jSGwNQDlpI (Chromosome structure and formation)

· https://youtu.be/NNHUbDxjpC8 (Cell cycle)

· https://youtu.be/DwAFZb8juMQ (Mitosis 3D animation)

Assignment:

ASSIGNMENT I FOR STRUCTURE OF CHROMOSOMES, CELL CYCLE AND CELL DIVISION

1. NAME THE FOLLOWING: [6×1=6]

A. The complex of DNA and proteins.

B. The scientist who discovered chromosomes.

C. The components of a nucleotide.

D. The point of attachment of two chromatids.

E. The complex formed when a DNA strand winds around 8 histone proteins.

2. Draw neat labelled diagrams of the following: [4]

A. Schematic diagram of double helical structure of DNA

B. The basic structure of a nucleotide

ASSIGNMENT II FOR STRUCTURE OF CHROMOSOMES, CELL CYCLE AND CELL DIVISION

1. FILL IN THE BLANKS: [6×1=6]

A. DNA replicates in the _________ of the cell cycle.

B. Mitosis occurs in our _________ cells.

C. Mitosis produces two daughter cells whereas meiosis produces _________ daughter cells.

D. Meiosis occurs only in ________ cells.

E. Modern humans have 46 chromosomes. Their sperms and eggs will have _________ chromosomes each.

F. During the pairing of chromosomes in meiosis, the _______ chromosomes come to lie side by side.

2. Draw neat labelled diagrams to show the different stages of mitosis in plant cells/animal cells. [4]

DATE OF SUBMISSION:

Complete the assignments given and mail them back to your respective subject teacher LATEST BY 21^st March, 2020.

Compiled by:

Priyanka Majumdar (10C, 10D)

Meghna Mustafi (10A, 10E, 10F)

Joydeep Mukherjee (10B)

Email ids of Teachers:

priyanka.majumdar@dpsn.org.in

meghna.mustafi@dpsn.org.in

joydeep.mukherjee@dpsn.org.in

Once the checked assignments are mailed back to you, take a print and paste them in your bio copy WITHOUT FAIL.

Lesson : The Excretory System

Ppt on Circulatory System