Science chapter 3

How do cells and DNA demonstrate irreducible complexity?

one cannot function without the other

What is a gene?

segment of DNA that codes for a protein

what are the three parts of a nucleotide?

sugar, phosphate, base

How do DNA and genes show evidence of a Designer?

the Stucture of the cell and the process that helps it live is so complex. All the part must working and present. Cells had been made so complex it had to be made by a creator.

what determines the order of amino acids in a protein?

the sequence of codons in mRNA

What is the purpose of meiosis?

to produce egg and sperm cells that have only one copy of each chromosomes.

In DNA what pairs with guanine?

Cytosine

The process where one DNA molecule forms two identical DNA molecule is ________ ___________________

DNA replecation

How do mitosis and cytokinesis differ?

Mitosis divides the DNA while cytokinesis divides the rest of the cell contents.

Suppose a cell had 20 chromosomes at the beginning of its cell cycle. After mitosis and cytokinesis were completed, each newly formed cell would have _____ chromosomes.

20

the body cell of a rabbit contains 44 chromosomes. How many chromosomes would a rabbit egg contain?

22

How are DNA replication and transcription similar? How are they different?

Both involve pairing nucleotides and use a stand of DNA as the pattern. DNA replication results in two new identical DNA stands.

What is the function of tRNA

Transfer RNA transfers each amino acid to the ribosome as it is specified by the coded messages in the mRNA.

In RNA what base bonds with adenine?

Uracil

A codon for a _________ ________

amino acid

In which phase of mitosis do the sister chromatids separate into two different chromosomes?

anaphase

During transcription the information in a DNA molecule is copied to produce ______________ molecule

mRNA