DNA/genes Flashcards
What are strands of DNA bundled into in a cell with a nucleus?
Chromosomes
What is the relationship between genes and DNA?
DNA carries the genes.
What is not true of DNA?
DNA is made up of 5 subunits.
What does the rungs of the DNA ladder look like?
A pair of bases
What are the subunits of DNA?
Nucleotides
What are nucleotides made up of?
A sugar, phosphate, and base
What are the pairs of DNA?
Adenine and Thymine
Cytosine and Guanine
If there is 30% of Cytosine in a sample of DNA, there will be 20% of what?
Adenine
Three bases code for one what?
Amino acid
What is the complementary strand of a DNA sequence to TAGTCA?
ATCAGT
What nitrogen base is not contained in DNA?
Uracil
For a DNA molecule to be replicated, or copied, what does a DNA molecule do?
Splits down the middle
What is the first step of DNA replication?
A strand of DNA splits down the middle
What are the units of of protein which link together in a specific order?
Amino acids
What carries the codes for making proteins?
RNA
What is the first step of protein production?
RNA making a mirror-like copy of a DNA sequence
What is a permanent change in the genetic makeup of a cell?
Mutation
What can a mutation produce?
The wrong protein
What is genome?
The genome is the entire set of DNA on chromosomes.
Human genomes are made up of 23 pairs, or 46 chromosomes.
Strawberries have a genome.
The genomes of humans and chimpanzees are 99% similar.
How is RNA different than DNA?
RNA is a single helix; DNA is a double helix.
In RNA, the base U replaces base T.
RNA is found in the cytoplasm and ribosomes.
RNA possesses a ribose sugar.
What cell part synthesizes proteins using messenger and transfer RNA?
Ribosomes
What super scientist would be interested in how ribosomes, cytoplasm, and nucleus are involved in the process of protein synthesis and DNA replication?
Cell biologist
What is protein synthesis?
To create, or manufacture proteins
What scientist said the amount of Adenine equals the amount of Thymine in DNA?
Erwin Chargraff