ACW science lesson 1 semester 1

What are nucleotides?

• Small molecules that all bones, muscles, nerves and other body parts contain and they function separately.

• Small molecules that are the basic building blocks of nucleic acids (DNA & RNA).

• Small molecules that are part of the nervous system of all organisms.

• Molecules that are the powerhouse of all living cells.

How many genes does your body contain (approximately)?

• Between 50 thousand and 80 thousand

• Between 2 thousand and 10 thousand

• Between 35 thousand and 50 thousand

• Between 25 thousand & 40 thousand

What is a gene?

• A gene is the smallest molecule in the body and it communicates with other cells.

• A gene is a basic physical and functional unit of heredity and its a segment of a DNA.

• A gene is a molecule that is part of a cell and it stores energy (in sugars) that a cell can use.

• A gene is a part of a DNA that makes the DNA twist into a double helix.

What is a mutation?

• A mutation is when the hair or eye colour changes.

• A mutation is when body parts change due to environmental pressure.

• A mutation is a change in the sequence of the nucleotides in the DNA.

• A mutation is a change in the body when its cells multiply.

What kind of atoms the basis of nucleotides build from?

• Calcium, carbon, hydrogen, nitrogen and phosphorus.

• Carbon, oxygen, hydrogen, nitrogen and phosphorus.

• Oxygen, nitrogen, hydrogen, and phosphorus.

• Oxygen, carbon, nitrogen and phosphorus.

Why is DNA called a double helix?

• Because a DNA molecule is built of two linked strands that resemble a twisted ladder in a helix-like shape.

• Because DNA is a long molecule with many nucleotide and when it is in function it twists into a double helix-like shape.

• Because DNA is in every organism and it is a long molecule that is made of many strands.

• Because DNA is built as a long molecule and when it is in the cell it gets twisted.

How many differing nucleotide parts, called bases, are in the DNA?

• 6

• 8

• 4

• 12

What does the D stand for in DNA?

• A protein called deoxyribose.

• A nitrogen called deoxyribose.

• A phosphate called deoxyribose.

• A sugar called deoxyribose.

What the DNA and the gene are compared to in the video?

• DNA is compared to a library and the gene is compared to a book in that library.

• DNA is compared to a bookshop and the gene is compared to a book in that bookshop.

• DNA is compared to a bookshop and the gene is compared to a letter.

• DNA is compared to a library and the gene is compared to an article in that library.

What is the information stored in the DNA used for?

• To send messages between the cells and the body.

• Direct the building of different protein molecules.

• Direct the building of all nucleotides.

• To change the building of all the cells in the body when it reproduces.