Phospholipid bilayer Study guides, Class notes & Summaries
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AQA A-Level Biology Paper 1 2023 Q&A
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Describe the role of a ribosome in the production of a polypeptide. /3 - Correct answer1. mRNA binds to ribosome; 
2. Idea of TWO codons/binding sites; 
3. tRNA with ANTICODONS binds; 
4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA 
molecules); 
5. Moves along (mRNA to the next 
codon); 
Describe the structure of glycogen. /2 - Correct answer-1. Polysaccharide of α-glucose; 
OR 
polymer of α-glucose; 
2. (Joined by) glycosidic bonds 
OR 
Branched structure; 
NHE3 ac...
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BIO-K101 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS
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1. In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom byAnswer - polar covalent bonds 
 
2. Stanley Miller's 1953 experiments demonstrated conclusively thatAnswer - organic molecules can be synthesized abiotically under conditions that may have existed on early Earth 
 
3. What do the four 'elements of life' -carbon, oxygen, hydrogen, and nitrogen-have in common?Answer - They all have unpaired electrons in their valence shells 
 
4. Using the functiona...
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BIOL 1P91 – Final EXAM .OVER 280 QUESTIONS WITH VERIFIED CORRECT ANSWERS
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BIOL 1P91 – Final EXAM .OVER 280 
QUESTIONS WITH VERIFIED CORRECT 
ANSWERS 
Holds the cell together and controls what goes in and out - 
ANSWER cell membrane 
separates cell contents from the surrounding environment - 
ANSWER plasma membrane 
uptake and export of ions and molecules, cell 
compartmentalization, protein storing, anchoring cytoskeleton, 
production of ATP and NADPH, cell signalling, cell and nuclear 
division, and adhesion of cells to each other and to the 
extracellular...
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BIOL1P91 Final Exam Prep test Questions With Verified Answers
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BIOL1P91 Final Exam Prep test 
Questions With Verified 
Answers 
What are the 4 functions of the cell membrane 
1. seperating internal and external environment 
2. regulating traffic in the cell 
3. Holding contents of the cell in place 
4. creates interface for cellular activity 
What is the structure of the cell membrane 
- phospholipid bilayer 
- integral and peripheral membrane proteins 
- carbohydrate bonded to proteins 
- fluid mosaic model 
- asymmetrical leaflets 
fluid mosaic model of...
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IB Biology Paper 1 Questions And Answers Already Passed
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IB Biology Paper 1 Questions And 
 
Answers Already Passed 
 
Prokaryote or Eukaryote in paramecium? Compartments in the cell indicates that it's a 
eukaryote 
 
Property of water which makes it suitable for living? Thermal 
 
Watson and Crick discovery about DNA DNA is double helix 
 
What occurs in meiosis but not in mitosis? Homologous chromosomes pair up 
 
Variation within a population Fertilization and mutation 
 
properties of stem cells they can differentiate 
 
phospholipid bilayer the...
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Biol 1201 Exam 2 Gregg Latest Update Already Passed
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Biol 1201 Exam 2 Gregg Latest Update 
 
Already Passed 
 
Plasma membrane A selectively-permeable phospholipid bilayer forming the boundary of the 
cells. Hydrophilic heads and hydrophobic tails 
 
peripheral proteins Bound to the surface of the membrane 
 
Integral proteins penetrate the hydrophobic core 
 
Transport proteins Span membrane. Allow passage of hydrophilic substances 
 
functions of plasma membrane transport, enzymatic activity, signal transduction, cell-cell 
recognition, intercel...
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CSU BMS 300 Exam 2024 (100% Accurate answers)
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Water correct answers H2O, molecular weight=18, oxygen is partial negative charge, hydrogen has slight positive charge. 
 
What is a dipole moment? correct answers difference in charge on two ends of a molecule 
 
Anions correct answers negatively charged ions 
 
Cations correct answers positively charged ions 
 
covalent bond correct answers A chemical bond formed when two atoms share electrons 
 
hydrogen bond correct answers Attraction between a slightly positive hydrogen atom and a slightly ...
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HESI A2 V2 BIOLOGY Exam 2023/2024 Questions with Correct Answers.
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HESI A2 V2 BIOLOGY Exam 2023/2024 Questions with Correct Answers 
A patient receives an antibiotic for symptoms of the flu. Why 
doesn’t the medication work? 
The medication is for a different type of flu. 
The medication is not suitable for treating the flu. 
The medication is not a strong enough dosage amount to cure the 
patient. 
None of the above 
The correct answer is B. Antibiotics are used for treating bacterial 
infections, but the flu is caused by a virus. Although symptoms can 
be s...
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BIO 210 - Chapter 3 Questions and Answers Rated A+
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BIO 210 - Chapter 3 Questions and 
 
Answers Rated A+ 
 
Plasma membrane forms the outer boundary of the cell 
 
Cellular organelles each performs specific functions 
 
Nucleus contains the cell's genetic material and directs cell activities 
 
Cytoplasm the material between the plasma membrane and nucleus 
 
Main functions of cells -cell metabolism and energy release 
-synthesis of molecules 
-communication 
-reproduction and inheritance 
 
Plasma membrane also called the plasmolemma or cell m...
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BIOL 1P91 – Final EXAM .OVER 280 QUESTIONS WITH VERIFIED CORRECT ANSWERS
- Exam (elaborations) • 26 pages • 2023
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BIOL 1P91 – Final EXAM .OVER 280 
QUESTIONS WITH VERIFIED CORRECT 
ANSWERS 
Holds the cell together and controls what goes in and out - 
ANSWER cell membrane 
separates cell contents from the surrounding environment - 
ANSWER plasma membrane 
uptake and export of ions and molecules, cell 
compartmentalization, protein storing, anchoring cytoskeleton, 
production of ATP and NADPH, cell signalling, cell and nuclear 
division, and adhesion of cells to each other and to the 
extracellular...