Flashcards in Topic 3 - Genetics Deck (68)
Which structures are found inside the nucleus?
Which substance forms a long strand in each chromosome?
How do body cells make copies of themselves?
cell division, mitosis
How many chromosomes are there in a human body cell nucleus?
What happens in fertilisation?
two gametes fuse
What is the name of the cell formed in fertilisation?
zygote, fertilised egg cell
Which term means producing more of the same kind of organism?
What is the name of the human male gamete?
The DNA strand in a chromosome contains sections that carry instructions for characteristics. What are these sections called?
What molecule forms the genome of an organism?
Where are genes found?
[in sections of DNA] on chromosomes
What does a gene carry the instructions for?
making a protein
A protein is made by linking together smaller molecules. What are these smaller molecules called?
What is any molecule made of repeating units called?
A human cell contains 46 strands of DNA. Is it diploid or haploid?
Are the cells produced by meiosis haploid or diploid?
Are the cells produced by mitosis haploid or diploid?
What shape is DNA?
a double helix
What is a chromosome made out of?
DNA and proteins [to package the DNA]
What shape is a DNA molecule?
What part of a DNA strand contains the instructions for a protein?
What are the letters of the bases that form the DNA code?
A,C,T and G
How do these bases pair up in DNA?
A with T, C with G
Apart from bases, what other parts are needed in a DNA molecule?
phosphate group, sugar
What is one phosphate group, one sugar and one base called?
Why is DNA a polymer?
It is made of many nucleotides joined in a chain.
Give an example of a protein.
any example. E.g. an enzyme
How is the active site of an enzyme formed?
by folding of protein/polypeptide/amino acid chains
Why are proteins polymers?
They are made of many amino acids joined in a chain.