Genetic material is stored in the ___ of plant and animal cells.

Answer explanation

The nuclei of plant and animal cells contains the organisms DNA.

Match the word to its meaning.

• chromosome

• structures made of tightly packaged DNA

• genome

• a short section of DNA

• nucleus

• all of the DNA of an organism

• DNA

• a sub-cellular structure that stores DNA

• gene

• a large chemical molecule made of smaller chemical groups

Answer explanation

DNA is a large molecule that is wound into chromosomes that are stored in the nucleus of plants and animal cells. Genes are short sections of DNA and a genome is all the DNA of an organism; coding and controlling the inherited features and processes.

What is this structure called?

Answer explanation

Chromosomes are made of tightly wound DNA.

Put these in size order, starting with the smallest.

• chromosome

• gene

• chemical group, A,T,G,C

• genome

Answer explanation

The chemical groups join together to make DNA. A gene is a section of DNA that carries the genetic code to provide instructions for an inherited feature or process. Chromosomes are lengths of DNA that contain many genes.

True or false? The more similar the species, the more similar their genomes.

• true

• false

Answer explanation

The genomes of all living organisms are similar in part. But the more features and processes organisms have in common the more similar their genome.

Who is incorrect?

• 
• 
• 
• 

Answer explanation

Jacob is wrong. Non-coding sections of DNA are not genes but they are used to control when the instructions in the genes are used.