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Cell Theory: - 1. all living things are composed of cells 2. cell is the basic fundamental unit of life 3. chemical reactions of life take place inside the cell 4. cells arise from pre-existing cells 5. cells carry genetic information in the form of DNA - passed from parent to daughter cell nucleolus - - dense structure in the nucleus where ribosomal RNA synthesis occurs

is DNA or RNA more sensitive to base? - RNA define replication origins - short DNA regions that have specific nucleotide sequences how many origins of replication do eukaryotes have? prokaryotes? - eukaryotes = multiple prokaryotes = 1

coacervate droplets (1) - cluster of colloidal molecules surrounded by a shell of water, tends to absorb and incorporate substances from environment - precursors to first cells protoplasm - the substance of life carbohydrates - CHO in 1:2:1 ratio energy storage or structural molecules disaccharides and polymers formed by dehydration synthesis, broken down by hydrolysis

Definition of a molecule - Molecules are groups of 2 or more atoms joined via chemical bonds. Chemical bonds are due to electron interactions. Ionic and covalent bonds are.....whereas hydrogen bonds are..... - intramolecular intermolecular m Formula of an amine group - R-NH2

DAT Biology (ALL Practice Exam Questions) with Certified Solutions An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? Bryophyte In the fetal circulatory system, the ductus venosus allows blood to bypass? Liv...

Cyclic AMP - A secondary messenger important in many biological processes. It is a derivative of ATP and is used for intracellular signal transduction in many organisms. Which is a secondary messenger? - Cyclic AMP Plasmid - Small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Naturally exist in bacterial cells, but occur in some eukaryotes. Carry genes (act as vehicle) that provide bacteria with genetic advantages, such as antibiotic resistance.