Centrosome Guides d'étude, Notes de cours & Résumés

Honors Biology- Meiosis Questions and Answers Graded A+ What is the function of the chiasma in meiosis? The chiasma is the point where homologous chromosomes exchange genetic material during crossing over. What occurs during prophase I of meiosis that does not occur in mitosis? During prophase I, homologous chromosomes pair up and form tetrads, which does not happen in mitosis. How is genetic variation achieved through meiosis? Genetic variation is achieved through crossing...

USABO Open Exam Questions And Revised Correct Answers Updated Why is myelin important in the nervous system? A. It allows signals to travel faster along axons because depolarization occurs only at myelinated locations. B. It allows signals to travel faster along axons because depolarization occurs only at nonmyelinated locations. C. It bundles the dendrites of adjacent neurons together. D. It increases capacitance across the cell membrane, which helps electrical signals to leave th...

USABO Open Exam 2024 | 100%Correct Answers Verified Latest 2024 Version. 1. Why is myelin important in the nervous system? A. It allows signals to travel faster along axons because depolarization occurs only at myelinated locations. B. It allows signals to travel faster along axons because depolarization occurs only at nonmyelinated locations. C. It bundles the dendrites of adjacent neurons together. D. It increases capacitance across the cell membrane, which helps electrical signals to le...

Anatomy and Physiology Exam #1 (Ch.1-4) Questions & Answers 2024 Microvilli - ANSWER-Membrane extensions containing microfilaments. Function: absorption of extracellular materials. Cilia - ANSWER-Long extensions used for movement of material over cell surface. Proteasomes - ANSWER-Hollow cylinders that breakdown and recycle damaged or abnormal intracellular proteins. Ribosomes - ANSWER-RNA + proteins. Function: Protein synthesis. Peroxisomes - ANSWER-Vesicles containing degradat...

Centrosome - ans ----Central microtubule organized center of cells. In animal cells, it contains two centrioles. Actin Filament - ans ----Component of the cytoskeleton; plays a role in the movement of the cell and its organelles; a protein filament in a sarcomere of a muscle, its movement shortens the sarcomere, yielding muscle contraction Bacillus - ans ----A rod-shaped bacterium; also a genus of bacteria Capsule - ans ----A form of glycocalyx that consists of a gelati...

BIOD 101 Module 4 Portage Learning Exam With Complete Solutions Chromosomes - structures of packaged chromatin complexes Somatic cell - All of the body's cells except gametes Number of chromosomes in each somatic cell - 46 (23 pairs) Cell cycle - Process of parent cell replicating its genetic info and dividing into 2 new daughter cells cytokinesis - division of the cytoplasm interphase - G1, S, G2 phases. 90% of cycle time. Gap phase 1 - First phase, growth phase Messenger RNA (mR...

What is the DNA -> RNA process? - RNA polymerase I creates a transcript. This is primary RNA with 5' cap and 3' with poly(a) site. Maturation of RNA includes cleaving at the poly(a) site and RNA splicing of introns to leave matureRNA. What is the mRNA to protein process? - Codons run through ribosome in 3 base pairs. A corresponding tRNA recognises 3 base pair and brings with it conjugate bases and an AA. This adds the relevant AA for every 3 base pair, creating a polypeptide. What is...

BIOD 210 Genetics Final Exam With Questions and Answers 100% Solved A nucleotide is made up of what 3 components? - answerphosphate group, pentose sugar (deoxyribose in DNA and ribose in RNA), and a nitrogenous base What nitrogenous bases are purines - answerAdenine and Guanine What nitrogenous bases are pyrimidines? - answercytosine, thymine, uracil How can you differentiate between purines and pyrimidines? - answerpurines are double- ringed while pyrimidines are single-ringed What are ...

BIOD 210 Genetics Final Exam With Questions and Answers 100% Solved A nucleotide is made up of what 3 components? - answerphosphate group, pentose sugar (deoxyribose in DNA and ribose in RNA), and a nitrogenous base What nitrogenous bases are purines - answerAdenine and Guanine What nitrogenous bases are pyrimidines? - answercytosine, thymine, uracil How can you differentiate between purines and pyrimidines? - answerpurines are double- ringed while pyrimidines are single-ringed What are ...

Abiogenesis - The process of life originating from inanimate (lifeless) matter by natural causes All forms of life grouped into these 3 domains - Archaea Bacteria Eukarya Amyloplasts - A type of leucoplast Colorless plastids that store starch, a product of photosynthesis Anaphase - Sister chromatids separate and move to opposite spindle poles Movement continues until the separated chromatids are now called daughter chromosomes Anchoring belts - form belts that run entirely around cells ...