Hydrogen bonding Study guides, Class notes & Summaries
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![BLG1501 Assignment 1 2024 Semester1 (Solutions)](/docpics/4603476/65dc7089899ab_4603476_121_171.jpeg)
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BLG1501 Assignment 1 2024 Semester1 (Solutions)
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BLG1501 Assignment 1 2024 Semester1 (Solutions) 
 
Question 1 
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Question text 
What is the basic unit of life? 
a. 
Cells 
b. 
Nuclei 
c. 
Organelles 
d. 
DNA 
Question 2 
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RNA is an example of a _____. 
a. 
polysaccharide 
b. 
fat 
c. 
polypeptide 
d. 
nucleic acid 
Question 3 
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What is the chemical composition of fats? 
a. 
fatty acid...
![Biology 1610 FINAL USU 2022/2023 (Questions And A nswers)](/docpics/632c32626e269_1977526.jpg)
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Biology 1610 FINAL USU 2022/2023 (Questions And A nswers)
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The most common isotope of hydrogen has one proton, no neutrons, and one electron. An isotope of hydrogen with 1 neutron would have: 
an atomic number of 1 and a mass number of 2 
 
 
In a covalent bond: 
electrons are shared between atoms so that all atoms have full outer shells 
 
 
 
A property of a system that is present at one level of organization but absent at the levels below is called: 
an emergent property 
 
 
An ionic bond is 
weaker than a covalent bond 
 
 
Modern taxonomy attempts...
![AQA GCSE Separate Science Chemistry – Paper 1 Higher Tier Predicted Paper 2023 With marking scheme](/docpics/2742131/645fb3d0bd5a9_2742131_121_171.jpeg)
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AQA GCSE Separate Science Chemistry – Paper 1 Higher Tier Predicted Paper 2023 With marking scheme
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AQA GCSE Separate Science 
Chemistry – Paper 1 Higher Tier 
Predicted Paper 2023 With marking scheme 
	 
Name …………………………………………………………………… 
Date ………………… 
 
 
1 hour 45 minutes allowed. 
You may use a calculator and an AQA periodic table. 
 
 
 
 
Grade boundaries 
These are VERY rough guesses! Getting a 7 on this paper does not guarantee you the same mark in the exam. 
 
 
 
•	9	70% 
•	8	60% 
•	7	50% 
•	6	45% 
•	5	35% 
...
![ANATOMY AND PHYSIOLOGY TEST 1/2/3/4/5/6/7 QUESTIONS AND ANSWERS LATEST UPDATED 2023](/docpics/63d44748b193e_2308605.jpg)
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ANATOMY AND PHYSIOLOGY TEST 1/2/3/4/5/6/7 QUESTIONS AND ANSWERS LATEST UPDATED 2023
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ANATOMY AND PHYSIOLOGY TEST 1/2/3/4/5/6/7 QUESTIONS AND ANSWERS LATEST UPDATED 2023. How can such a weak bond like hydrogen bond work to make DNA such a stable molecule? - 
ANSWER hydrogen bonds bond DNA into its double-helix structure by holding together the 
base pairs in the middle; they cause molecules to fold and coil into precise threedimensional shapes 
which elements are found in organic molecules? - ANSWER carbon, hydrogen, and oxygen 
acid - ANSWER proton donor 
base - ANSWER proton ac...
![Test Bank For Vander’s Human Physiology 14th Edition (complete) | A Descriptive Test Bank for Vander’s Human Physiology 14th Edition_ Latest updated 2022](/docpics/63abee60e8dd1_2204164.jpg)
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Test Bank For Vander’s Human Physiology 14th Edition (complete) | A Descriptive Test Bank for Vander’s Human Physiology 14th Edition_ Latest updated 2022
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Test Bank For Vander’s Human Physiology 14th Edition A Descriptive Test Bank for Vander’s Human Physiology 14th Edition By Eric P. Widmaier Dr., Hershel Raff, Kevin T. Strang Dr. What is this product? Test Bank for Vander’s Human Physiology 14th Edition is not a textbook, instead, this is a test bank or solution manual as indicated on the product title. Test Bank: This is a supplement to the textbook created by experts to help you with your exams. It is a collection of exam questions based...
![Anatomy and Physiology I Final exam test bank 20222023 (questions and answers) GRADED A UPDATE](/docpics/6376ea305d9e0_2115176.jpg)
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Anatomy and Physiology I Final exam test bank 20222023 (questions and answers) GRADED A UPDATE
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Question 1 Correct 1.00 points out of 1.00 Flag question Question text In an ecosystem, energy Select one: a. comes ultimately from bacteria b. cycles along with chemical nutrients c. typically flows from producers through a series of consumers d. typically flows from consumers to producers to decomposers Question 2 Correct 1.00 points out of 1.00 Flag question Question text Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least in...
![WGU C785 Biochemistry OA Questions and Answers 2022](/docpics/62edb4673c188_1885276.jpg)
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WGU C785 Biochemistry OA Questions and Answers 2022
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Which level of protein structure is disrupted through the hydrolysis of peptide bonds? 
 
Quaternary 
 
Tertiary 
 
Primary 
 
Secondary - ANSWER Primary 
 
The primary structure of a protein is the sequence of amino acids held together by peptide bonds. Peptide bonds are formed by dehydration reactions and disrupted by hydrolysis. 
 
A mutation in the beta-hemoglobin gene, which results in the replacement of the amino acid glutamate in position 6 with the amino acid valine, leads to the develop...
![WGU C785 Biochemistry Final Exam Questions and Answers 2022/2023](/docpics/632e2a8569d5f_1981503.jpg)
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WGU C785 Biochemistry Final Exam Questions and Answers 2022/2023
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WGU C785 Biochemistry Final Exam Questions and Answers 2022/2023 
What is the basic structure of an amino acid? What do they look like? Correct Answer- amino group (NH2 or NH3), carboxyl group (COO or COOH), alpha carbon (C), and variable group 
 
How do you identify the 3 different types of side chains: non-polar/hydrophobic, polar, and charged? Correct Answer- Non-polar/hydrophobic - end with CH or "can't have" water. Polar - end with OH, SH, or NH. Charged - end with a charge 
 
what kinds...
![Edexcel iGCSE Chemistry, question and answer with rated solution](/docpics/6405d15365985_2440515.jpg)
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Edexcel iGCSE Chemistry, question and answer with rated solution
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Edexcel iGCSE Chemistry, question and answer with rated solution 
Experiment for Diffusion? 
1) HCl placed at one end of the test tube, ammonia solution at the other. 
2) Where they meet, a ring of Ammonium Chloride appears. 
3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. 
 
 
 
Experiment for Dilution? 
1) Put a coloured substance in a solvent e.g food colouring in water. 
2) Over the time, the colour le...
![HESI A2 CHEMISTRY-CHRISJAY FILES (1) (1)](/docpics/63c0728204a6f_2251327.jpg)
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HESI A2 CHEMISTRY-CHRISJAY FILES (1) (1)
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HESI A2 ENTRANCEEXAM 
FOR 
CHAMBERLAINCOLLGE 
OF NURSING 
2023 QUESTIONS WITH 
ANSWERS 
CHEMISTRY 
HESI A2 CHEMISTRY V1/V2 FILE 
1. If a Hydrogen isin a compound, what would its oxidation number be? 
+1 
2. What isthe oxidation number of any simple ion? 
+1 or -1 depending on the charge of the ion 
3. How many kilograms are in a pound? 
0. kg 
4. What is the temperature for freezing point of water in Celsius? 
0 degrees Celsius (32°F for Fahrenheit) 
5. What is the conversion of Celsius to Fah...
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