Cell fractionation Study guides, Class notes & Summaries

AQA A-Level Biology Questions with Answers | Graded A Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. (5 marks) [Unit 1, June 16] - Correct Answer ️️ -1. Na+ ions leave epithelial cell and enter blood; 2. (Transport out is by) active transport / pump / via carrier protein using ATP; 3. So, Na+ conc. in cell is lower than in lumen (of gut); 4. Sodium/N...

AQA A-Level Biology. 3.2 – Cells questions and answers 100% guaranteed success. Structure of Nucleus. - correct answer. 1. Nuclear envelope: double membrane surrounding nucleus, outer membrane continuous with the (R)ER of the cell. 2. Nuclear pores: allow the passage of larger molecules, such as mRNA, out of the nucleus. 3. Nucleoplasm: granular, jelly-like material making up the bulk of the nucleus. 4. Chromosomes: protein-bound, linear DNA. 5. Nucleolus: small...

1) When biologists wish to study the internal ultrastructure of cells, they can achieve the finest resolution by using A) a phase-contrast light microscope. B) a scanning electron microscope. C) a transmission electronic microscope. D) a confocal fluorescence microscope. E) a super-resolution fluorescence microscope. - correct answer C 2) The advantage of light microscopy over electron microscopy is that A) light microscopy provides for higher magnification than electron microscopy. B...

Biology 1406 Exam 2 Review (chapters 6,7,8) Collin College - Question and answers rated A+ Biology 1406 Exam 2 Review (chapters 6,7,8) Name the scientists who first studied cells and mention their contributions. - correct answer Robert Hooke: first person to view cells, first person to build a microscope. Antonie van Leeuwenhoek: first person to view living cells (bacteria, pond water) .Matthias Schleiden and Theodore Schwann (1830): proposed the cell theory (all living things are composed ...

Which cell types have the lowest radiosensitivity: nerve cells muscle cells spermatids lymphocytes - nerve cells (except in fetal life, they are highly radiosensitive) Which cells are the most radiosensitive in the body - lymphocytes Which interaction between x-ray photons and matter involves a high energy photon and the ejection of an outer shell electron? photoelectric effect coherent scatter Compton scatter pair produciton - Compton scatter What is likely to occur if 250 mGy is ac...

BIOD 101 PRACTICE EXAM QUESTIONS WITH ANSWERS NEW GENERATIONS Organelles of the endomembrane system include all of the following EXCEPT: a. endoplasmic reticulum b. lysosomes c. mitochondria d. endosomes e. Golgi complex c. mitochondria Which one of the following is a FALSE statement about secretory pathways? a. materials produced in the endoplasmic reticulum may leave the cell by phagocytosis b. during constitutive secretion, materials are continually secreted from the cell c....

Biology 1406 Chapter 6 well answered Light Microscope - correct answer (microscope) where visible light is passed through the specimen and then through glass lenses. The lenses refract the light in such a way that the image of the specimen is magnified. Used to study organelles Parameters In Microscopy - correct answer Magnification is the ratio of an object's image size to its real size. Resolution is a measure of the clarity of the image. Contrast accentuates differences in parts of the...

Light Microscope - -visible light is passed through a specimen Magnification - -ratio of image to real size Resolution - -image clarity Contrast - -difference in brightness Cell fractionation - -Takes cells apart -separate organelle -Determine function of organelles Prokaryotic Cell - -NO nucleus -DNA is unbound region (nucleoid) Eukaryotic cells - -DNA is in nucleus -membrane bound organelles -larger then prokaryotic cells The Nucleus - -Cell's genes -DNA in chromosomes Nucleolus...

What is the TD 5/5 for the kidney? - correct answer 23 Gy What would a QA level 1 action item require? - correct answer Inspection, but treatment can continue What is the backscatter factor at the level of Dmax? - correct answer Tissue Air Ratio (TAR) What technique can be used to accomplish forced shallow breathing? - correct answer Gating What are the parts of the oral cavity? - correct answer Floor of the mouth, retromolar trigone, gingiva, anterior 2/3 of tongue, hard palate W...

What is the TD 5/5 for the kidney? - Correct Answer 23 Gy What would a QA level 1 action item require? - Correct Answer Inspection, but treatment can continue What is the backscatter factor at the level of Dmax? - Correct Answer Tissue Air Ratio (TAR) What technique can be used to accomplish forced shallow breathing? - Correct Answer Gating What are the parts of the oral cavity? - Correct Answer Floor of the mouth, retromolar trigone, gingiva, anterior 2/3 of tongue, hard palate W...