Dat biology - Study guides, Class notes & Summaries

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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

Which of the following does not occur during telophase? A. Reassembly of the nuclear envelope B. Reappearance of the nucleoli C. Uncoiling of the chromosomes D. Centromere division E. Dismantling of the spindles - D. Centromere Division Explanation: Centromere division occurs during anaphase of mitosis and during anaphase II of meiosis Enzymes which catalyze the phosphorylation of organic molecules are called A. Lipases B. Kinases C. Mutases D. Amylases E. Esterases - B. Kinases Exp...

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

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

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. Wh...

True or False Plant cells use mitochondria to convert the glucose they produce into ATP. True Plant cells don't have centrioles instead they have MTC ___________ sticky cement which attaches adjacent plant cells to each other. Middle lamella Plant cells are connected to each other via ______ which is analogous to __________ in animal cells Plasmodesmata Gap junctions The ATP produced in chloroplasts are used In the dark reactions of photosynthesis to power the Calvin cycle thus sy...

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.

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 protoplasmthe substance of life carbohydratesCHO in 1:2:1 ratio energy storage or structural molecules disaccharides and polymers formed by dehydration synthesis, broken down by hydrolysis lipids1 glycerol bonded to 3 fatty acids do NOT form polymers, used for food storage Derivatives: phospholipids, waxes, steroids...