Dat biology exam - Study guides, Class notes & Summaries

Mark's DAT Biology Exam Questions With Accurate Answers. What happens to the free energy of a reaction if it is catalyzed by an enzyme? - answerThe free energy of an enzyme-catalyzed reaction is the same as the reaction without the enzyme. What happens as the concentration of substrate is increased in an enzyme-catalyzed reaction? - answerThe reaction rate increases until most of the active sites are filled and then the reaction rate reaches a plateau. What is the optimal temperature for...

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DAT Biology exam #1 with answer explanation All of the following statements are part of modern cell theory EXCEPT one. Which one is the EXCEPTION? A. An organism's activity is dependent on the activity of its independent cells. B. Metabolism and biochemistry occur within cells. C. Hereditary information is stored in cells and is shared between cells during cell division. D. All cells contain a nucleus for the storage of genetic material. E. All cells in organisms of similar spec...

AC-HPAT Biology Exam Questions And Answers (Updated And Verified) Pancreas and Type 1 diabetes - answerThe pancreas is the organ that produces insulin, and it plays a major role in regulating blood glucose levels. Type 1 diabetes occurs when the pancreas does not make enough or any insulin. How does insulin work in diabetes? - answerInsulin pumps are small, computerized devices that mimic the way the human pancreas works by delivering small doses of short acting insulin continuously (basa...

MCAT Biology Exam Latest Updated 2024 With Complete Solutions Natural selection (types) Different types of selection lead to changes in phenotype: 1) Stabilizing selection 2) Directional selection 3) Disruptive selection 4) Adaptive selection Stabilizing selection Keeps the phenotypes in a narrow range, excluding extremes. Directional selection Moves the average phenotype toward one extreme. Disruptive selection Moves toward two different phenotypes at the extremes and can lead to sp...

Central Dogma - Answer-DNA → RNA → Protein Purines - which bases? - how many rings? - Answer- Pyrimidines - which bases? - how many rings? - Answer-Remember: "Pyrimidine" has a "y" in it; so does "cytosine" and "thymine." Phosphodiester Bond - Answer-Joins one nucleotide to the next; between the 3rd C of one ribose and the 5th C of the other to create the sugar-phosphate backbone Directionality of DNA (convention) - Answer-5' → 3' (but strands are antiparallel, s...

MCAT Psychology & Sociology, MCAT Biochemistry & MCAT Biology Exam Latest Updated 2024 With Complete Solutions Long-Term Potentiation (LTP) A persistent increase in synaptic strength following high-frequency stimulation of a chemical synapse. Retrieval Information stored in long-term memory can return to working memory through this process. Semantic Networks Organize information in networks of meaningfully related memories. Spreading Activation One item triggers an activation of related ...

glycolysis - - exergonic bc releases ATP still does use ATP produce 2 ATP, 2 pyruvate, 2 NADH transmission electron microscope (TEM) - - very magnified 2D image of single bacterial cell must be very thin CROSS-SECTION of cell must be DEAD scanning electron microscope - - 3D image of single bacterial cell - requires cells to be DEAD then stained

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does DNA polymerase or RNA polymerase need a primer? - RNA RNA polymerase binds to an area called ____ - promoter what does the promoter do? - RNA polymerase attaches/initiates transcription Explain initiation in transcription - promoter binding occurs, RNA polymerase lands. DNA helix unwinds + enzyme initiates RNA synthesis @ start point on the template strand do eukaryotes or prokaryotes have a pribnow box? - prokaryotes