Ribose - Study guides, Revision notes & Summaries
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2024 AQA AS BIOLOGY 7401/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 VERIFIED / Biology AQA AS level 7401/1 Paper 1
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2024 AQA AS BIOLOGY 7401/1 
Paper 1 Question Paper & 
Mark scheme (Merged) June 
2023 VERIFIED / Biology AQA 
AS level 7401/1 Paper 1 
Describe the induced-fit model of enzyme action - ANSWER-- 
active site not complementary to/does not fit substrate 
- Shape of active site changes as enzyme- substrate complex forms 
- Distorting bonds (in substrate leading to reaction) 
• The human cell then makes a complementary strand to the HIV DNA. 
The complementary strand is made in the same way as a ne...
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AC-HPAT Prep (Biology, Chemistry, Physics, Math) 188 Questions With Complete Solutions.
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AC-HPAT Prep (Biology, Chemistry, Physics, Math) 188 Questions With Complete Solutions. 
 
Most of the cell membrane's specific functions are controlled by: 
Proteins 
Alcoholic Fermentation is a form of: 
Anaerobic Respiration 
Phagocytosis is a form of: 
Endocytosis 
What is a pyruvate? 
Pyruvate is an important chemical compound in biochemistry. It is the output of the metabolism of glucose known as glycolysis. One molecule of glucose breaks down into two molecules of pyruvate, which are then...
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BSC 108 Exam 3 Kennedy Questions and Answers Solved 100% Correct!!
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The structure of a strand of DNA. - Answer-it is a double helix, like a twisted ladder. 
the ladder rings are nucleotide subunits and they have a covalent bond to the sugar phosphate 
backbone (made of deoxyribose and a phosphate group) 
What are the nucleotide subunits? - Answer-adenine, guanine, cytosine, and thymine 
How are the subunits held together? - Answer-through a hydrogen bond 
What are the nucleotide subunits compliments? - Answer-Adenine and thymine 
cytosine and guanine 
How does D...
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SEMMELWEIS ENTRANCE MEDICINE BIOLOGY EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADEA+
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SEMMELWEIS ENTRANCE MEDICINE 
BIOLOGY EXAM | QUESTIONS & 100% 
CORRECT ANSWERS (VERIFIED) | LATEST 
UPDATE | GRADEA+ 
What are carbohydrates and lipids? 
Correct Answer: Organic compounds that are mostly composed of three types of 
atom; carbon, hydrogen and oxygen 
What do carbohydrates do? 
Correct Answer: provide energy, in the form of sugars like glucose and fructose, but 
they also make up structures like cellulose, which form the cell wall of plant cells 
What type of carbohydrate is...
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BIOL 1408 exam 2 Questions and Answers 2024 update
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BIOL 1408 exam 2 Questions and Answers 2024 update 
BIOL 1408 exam 2 Questions and Answers 2024 update 
 
 
Points Awarded	47.00 
Points Missed	3.00 
Percentage	94.0% 
 
1. 
A scientist claims to have created a machine that can run forever, therefore producing as much energy as it consumes. This claim violates: 
A)	The first law of thermodynamics 
B)	The second law of thermodynamics 
C)	The third law of thermodynamics 
D)	The law of endergonic reactions 
E)	The law of exergonic reactions 
2. 
Wh...
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Edexcel A Level Biology Paper 1 Mark Scheme June 2023 (Salters Nuffield)
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uestion 
Number 
Answer Mark 
1(a) The only correct answer is C a place where an organism lives 
A is incorrect because a group of organisms of different species living in the same area is a 
community 
B is incorrect because a group of organisms of the same species living in the same area is a 
population 
D is incorrect because the role of an organism is its niche 
(1) 
Question 
Number 
Answer Additional guidance Mark 
1(b)(i) A description that makes reference to three of the following 
• ...
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CPPS 403 Pre-Midterm exam 2023 with 100% correct answers
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Central Dogma - correct answerDNA-(Transcription) - RNA- (Translation) -Protein 
 
DNA Structure - correct answer1. Deoxyribose: 5 Carbon atoms are numbered 1' to 5' . Hydrogen attached to 2'. Sugar 
2. Phosphate group 
Sugar-Phosphate backbone is asymmetric because PO4 groups connect the C5' of a sugar with the C3' of neighbouring sugar. = Asymmetric ends because the C5' end is attached to a PO4 and the C3' end is simply a hydroxyl group of the sugar. 
3. Nucleic Acid: No-covalently bon...
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CSU LIFE 102 FINAL EXAM QUESTIONS & ANSWERS SOLVED 100% CORRECT!
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Phosphorus has an atomic number of 15. This tells us that... - Answer-there must be 15 protons 
True or False: covalent bonds are stronger than ionic and hydrogen bonds because atoms that are joined 
with covalent bonds share electrons - Answer-True 
An e- in a hydrogen atom exists in the first valence shell. The valence e- of Aluminum exist in the 3rd 
shell. Which valence shell e- have higher potential energy and why? - Answer-the valence e- of 
aluminum, bc higher e- shells have higher energy...
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Biochem Module 6 (Portage Learning), CHEM 210 Biochemistry Questions and Answers 100% Graded A+ Updated 2024
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Biochem Module 6 (Portage Learning), CHEM 210 Biochemistry Questions and Answers 100% Graded A+ Updated 2024 
 
In DNA, adenine always pairs with ________. 
 
- Thymine 
- Guanine 
- Uracil 
- Cytosine - CORRECT ANSWER-- Thymine 
 
DNA is built from which of the following? 
 
- Nucleosides 
- Genes 
- Purines 
- Nucleotide 
- Codons - CORRECT ANSWER-- Nucleotide 
 
The double helix of DNA is stabilized mainly by __________. 
 
- Ionic bonds 
- Covalent bonds 
- Ion-dipole bonds 
- Hydroge...
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(MB) ASCP Practice Exam Questions and Answers
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(MB) ASCP Practice Exam Questions and Answers 
 
Which of the following is not a component of a nucleotide? 
Phosphate group 
Anti-codon 
Ribose sugar 
Nitrogen base - ANSWER Anti-codon 
 
According to Chargaff's rule of base pairing, adenine pairs with: - ANSWER Thymine 
 
What genes would be screened in a breast cancer panel? - ANSWER HER2, ERBB2, BRCA1 
 
Next Generation Sequencing uses: - ANSWER Short sequence reads 
 
Purines and pyrimidines differ from each other in that: - ANSWER Purine...
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