Mcat bio - Study guides, Class notes & Summaries

MCAT Bio/Biochem Questions and Answers | Latest Version | 2024/2025 | 100% Verified Explain the role of the sodium-potassium pump in maintaining resting membrane potential. The sodium-potassium pump actively transports three sodium ions out of the cell and two potassium ions into the cell, helping to maintain the resting membrane potential by creating an electrochemical gradient. Describe the process of oxidative phosphorylation in cellular respiration. Oxidative phosphorylatio...

Collagen - Makes up most of the extracellular matrix of connective tissue, provides strength and flexibility, trihelical fiber with glycine residues. Elastin - Component of extracellular matrix of connective tissue - stretches and recoils to restore original shape of tissue. Kinesins and dyneins - Motor proteins associated with microtubules; important for cell transport, chromosome alignment, cilia/flagella. Cadherins - A group of glycoproteins that mediate calcium-dependent cel...

What are the five steps of a reflex arcs? ANS - 1. sensory receptor 2. sensory afferent nueron 3. integration center interneuron 4. motor neuron efferent nueron 5. effector target (contraction occurs) formula for vasucal resistance ANS - resistance = change in pressure/flow pulmonary vascular resistance ANS - direct measurement of the pulmonary artery pressure in the left atrium or the wedge mean pressure for the pulmonary flow stroke volume ANS - The amount of blood ejected from th...

MCAT Biology Practice Questions With Complete Solutions. the chemical reaction that breaks down all the major macro-molecules - CORRECT ANSWER Hydrolysis What is the strongest type of INTER-molecular bonds? - CORRECT ANSWER Hydrogen bonds are the strongest intermolecular bonds.... diople-dipole bonds are weaker. . . Vander wall bonds are the weakest. Why is water a liquid at high temperatures? - CORRECT ANSWER Hydrogen bonding bonds the water molocules closer together. What is an ...

MCAT Biology Study Exam Questions Correctly Answered. Cell Theory - CORRECT ANSWER Four Tenets: 1. All living things are composed of cells 2. The cell is the basic functional unit of life 3. Cells arise only from preexisting cells 4. Cells carry genetic information in the form of DNA Eukaryotic Cells - CORRECT ANSWER Contain a true nucleus enclosed in a membrane. Prokaryotic Cells - CORRECT ANSWER Do not contain a nucleus. Organelles - CORRECT ANSWER Suspended in semifluid cytoso...

Examkrackers MCAT Biology with complete solution

the chemical reaction that breaks down all the major macro-molecules - ️️Hydrolysis What is the strongest type of INTER-molecular bonds? - ️️Hydrogen bonds are the strongest intermolecular bonds.... diople-dipole bonds are weaker. . . Vander wall bonds are the weakest. Why is water a liquid at high temperatures? - ️️Hydrogen bonding bonds the water molocules closer together. What is an ampipathic molecule? give an Example. - ️️A molecule with both hydrophobic and hydrop...

MCAT Biology Exam Questions With Verified And Updated Solutions. Cell Theory - answerFour Tenets: 1. All living things are composed of cells 2. The cell is the basic functional unit of life 3. Cells arise only from preexisting cells 4. Cells carry genetic information in the form of DNA Eukaryotic Cells - answerContain a true nucleus enclosed in a membrane. Prokaryotic Cells - answerDo not contain a nucleus. Organelles - answerSuspended in semifluid cytosol. In eukaryotic cells they are ...

MCAT Biology Practice Questions (ANSWERS) 2024 - DISTINCTION GUARANTEED / Complete Verified Latest Version

Central Dogma DNA → RNA → Protein Purines - which bases? - how many rings? Brainpower Read More 0:14 / 0:15 Pyrimidines - which bases? - how many rings? Remember: "Pyrimidine" has a "y" in it; so does "cytosine" and "thymine." Phosphodiester Bond 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) 5' → 3' (but strands are ant...