why is the nucleus called the control center of the cell
Because it controls all of the activities of the cell
What is a gene
a gene is a segment of dna that codes for a particular protein which in turn codes for a trait.
where in the cell are chromosomes located
they are located in the nucleus of the cell
dna can be found in what organelles
it can be found in the nucleus, the chloroplasts and the mitochondria.
which two scientists established the structure of dna
James Watson and Francis Crick
Replication is called semi conservative because half of the original strand is
saved, conserved
what are the sides of the dna ladder made of
They're made up of alternating sugar and phosphate
what are the 4 bases that make up the rungs of the Dna ladder
A (adenine) T (thymine) C (cytosine) G (guanine)
what sugar is found in Dna
Deoxyribose
What sugar is found in Rna
ribose
what base bonds with A (adenine)
T (thymine)
What base binds with C (cytosine)
G (guanine)
Why is Rna necessary to act as a messenger
Because the Dna is too big to go through the nuclear pores.
Proteins are made where in the cell
The ribosomes
How is Rna different from Dna
Rna has no thymine, Dna is a double strand while Rna is a single strand, and Rna has ribose sugar while Dna has deoxyribose
The process of copying DNa is called
Replication
What is the shape of Dna
A twisted ladder
Proteins are made from what subunits
Amino acids
what base is found in mRNA bud not DNA
Uracil
How is is that some cells become brain cells and others become skin cell even though all the dna is exactly the same. The instructions are the same.
Because it has become apparent that a celll has the ability to turn off most genes and only work with the genes necessary to do the job.
Why is Dna called the blueprint of life
It's called this because the Dna tells the cell how to build the organism. Every cell in our body has the same Dna
what units make up Dna
Nucleotides
What does Dna Look like
it looks like a twisted ladder
how does dna copy itself
It copies itself by copying its genetic information
What holds the sides of the dna ladders togerther
Hydrogen bonds
What’s the full name of dna
Deoxyribonucleic acid
What are A T C and G known as
Nitrogen bases