Download BIOCHEMISTRY MODULE 1 TO 8 EXAMS' & FINAL EXAM (2025 / 2026 PORTAGE LEARNING QUESTIONS A and more Exercises Chemistry in PDF only on Docsity!
BIOCHEMISTRY
MODULE 1 TO 8 EXAMS' & FINAL EXAM (2025 / 2026
PORTAGE LEARNING QUESTIONS AND VERIFIED ANSWERS
100% GUARANTEED PASS ||COMPLETE A+ GUIDE THIS CHEM 210 BIO CHEM EXAM CONTAINS:
❖ CHEM 210 Biochemistry Module 1……….Pg 02
❖ CHEM 210 Biochemistry Module 2 ………..Pg 11
❖ CHEM 210 Biochemistry Module 3 ……….Pg 22
❖ CHEM 210 Biochemistry Module 4 ………..Pg 33
❖ CHEM 210 Biochemistry Module 5 ……….Pg 46
❖ CHEM 210 Biochemistry Module 6 ……….Pg 66
❖ CHEM 210 Biochemistry Module 7 ……….Pg 86
❖ CHEM 210 Biochemistry Module 8 ……….Pg 98
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MODULE 1 What are three ways that biochemists study biological organisms? Your Answer: Structure, function, and communication within and among organisms. Biochemists study 1) the relationship between structure and function of biomolecules, 2) chemical reactions of organisms (metabolism), and 3) communication within and among organisms. What is the definition of biochemistry? Your Answer: Biochemistry is the study of chemical properties and functions of elements in the body. The structure function and chemical reactions within organisms. Also, know as the study of life. Often referred to as the chemistry of life, biochemistry asks how the remarkable properties of organisms relate to their molecules. What is another name for firefly? Your Answer: A lightning bug. lightning bug Is Li an element common in biological organisms? Your Answer: No, C, H, N, S, and P are the more common elements. 30 or more elements are found in organisms. The main ones are upper right of the periodic table. No. See Figure 1.3 for the common elements.
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False True. Some plants are made up of 90% water by mass. True or false: Large elements tend to make the strongest covalent bonds. True False False. Smaller elements tend to make the strongest bonds due to significant overlap. Name three bulk elements. Name three trace elements. Your Answer: H, O, C. Iron, Cobalt, zinc. Bulk elements (three of these): H, C, N, O, Na, P, S, Cl, K, and Ca Trace elements: Mg, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Mo, I, and W. The following statement is incorrect. Rewrite the statement to be correct. Statement: Organic chemistry is the study of metal compounds, while inorganic chemistry is the study of carbon compounds. Your Answer:
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Organic chemistry is the study of carbon compounds. Inorganic chemistry is the study of metals, non-metals and other trace minerals. Organic chemistry is the study of carbon-based compounds, while inorganic chemistry is the study of all other compounds, including metals, minerals, and other non-organic compounds. Is H 2 O an organic molecule? How about CO 2? C 100 H 202? Your Answer: H2O is inorganic the other two are organic. Water is not organic; it does not contain carbon. Both CO 2 and C 100 H 202 are organic compounds. The next row of Table 1 would be the 6 - carbon alkane, hexane. Write out its chemical formula and condensed formula. Your Answer: C6H CH3CH2CH2CH2CH2CH chemical formula: C 6 H 14 Condensed formula: CH 3 CH 2 CH 2 CH 2 CH 2 CH 3 On your own paper, draw the Kekule structures and line-bond formulas for both butane and hexane. When you have drawn the structures, enter a note in the answer box indicating you have done so (e.g., “I completed these drawings.” Or “I drew the structures for butane and hexane.”) Your Answer: Drawn Your drawings should appear as shown below.
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What functional groups are found in glycine? Your Answer: carboxylic acid and amine Carboxylic acid and amine Support or Refute this statement. The compound shown below, retinal, contains both alkene and ketone functional groups. (In your response, write “Support” or “Refute” and then give at least two reasons to justify your answer using complete sentences.) Your Answer: Ketone is O bonded to C bonded to two seperate C. O=C-C-C Aldehyde is O=C-H This is an aldehyde functional group. Refute. While retinal does indeed contain alkenes, it does not have a ketone. Carbon-carbon double bonds characterize the functional group known as alkenes. Several double bonds are present in the retinal, including one in the ring on the left and along the long carbon chain. On the other hand, a ketone is not present in retinal. A ketone is a C=O present with the C attached to two other carbon atoms. This group is not present in the compound, but an aldehyde is present. Aldehydes contain a C=O bond at the end of the carbon chain, which is present. Since the C=O is at the end of the chain, the C atom has an H bonded to it on one side and a C atom on the other.
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A cell wall is a combination of carbohydrates and proteins. What level of organization would this indicate and why? Your Answer: Two macromolecules form a supramolecular molecule. Supramolecular complex. A cell wall is a combination of two types of macromolecules to form a larger complex (through non-covalent interactions). What is the monomer of proteins, carbohydrates, and DNA? Your Answer: Amino acids, monosaccharides, and nucleic acid. The protein monomer is an amino acid, a monosaccharide is the monomer for carbohydrates, and a nucleotide is the monomer for DNA. How are prokaryotes and eukaryotes different? (State your answer in two or more complete sentences.) Your Answer: Eukaryotes have a nucleus, and complex organelles, and prokaryotes do not. While they are both cells types, prokaryotes have a simple structure with no organelles present. Eukaryotes have a true nucleus and organelle structures. As a result, the eukaryotes are also considerably larger than prokaryotes. How are Bacteria and Archaea different? (State your answer in two or more complete sentences.) Your Answer:
Your Answer: Yes
CHEM 210 Biochemistry Module 2 Exam (2025 / 2026) Portage Learning Questions and Verified Answers, 100% Guarantee Pass >> The pH of a solution of 3.2 x 10 - 10 M NaOH is: A. 3. B. 3.7 x 10 - 10 C. 4. D. 13 E. 8. _correct answer _ C. 4.5 Kw=[OH][H] pH=-log[H]
>>If the Ka of an acid is 7.45 x 10 - 10, what is the pKa? _correct answer _ 9.13 pKa=-log[Ka] >>List the acids in INCREASING order of strength (weakest to strongest): Nitrous acid (Ka = 4.0 x 10 - 4); acetic acid (Ka = 1.7 x 10 - 5); phosphoric acid (Ka = 7.3 x 10 - 3) _correct answer _ Acetic acid, nitrous acid, phosphoric acid larger value of Ka means a stronger acid smaller pKa value indicates a stronger acid >>Elemental bromine (Br2) is a liquid at room temperature. What is the dominant attractive force that exists between Br2 molecules in the liquid? _correct answer _ London Forces- temporary partial charges from random movement of e- >>Which one of the following molecules can form a hydrogen bond? A. HI B. HCl C. N D. CH
E. H2O
_correct answer _ C. N2 NOF >>A hydrogen bond can form between a hydrogen atom bonded to oxygen, O-H, and. _correct answer _ N/ O, F >>In a bond between P and Cl, there exists a difference in electronegativity resulting in partial positive and partial negative charges. If a dipole arrow were added to this structure, which way would the arrow point? _correct answer _ The arrow points from N toward Br Arrow points towards negative partial >>The following reaction occurs in glues purchased from hardware stores. Customers use this product to glue plastic together. Epoxy (l) + hardener (l) ⟶Glue (s) + heat given off What is the sign (+ or - ) of the change in ΘG and ΘH? A) ΘG is (+) and ΘH is (-) B) ΘG is (-) and ΘH is (-)
A) ΘG
B) ΘE
C) ΘH
D) ΘF
E) None of the above _correct answer _ E. None of the above >>Which buffer system is used by the renal system to maintain pH balance? _correct answer _ Bicarbonate buffer system >>A buffer can neutralize only a certain amount of acid and base. We say that this is its: _correct answer _ Buffer Capacity >>Is a pH of 3.91 acidic, neutral, or basic? _correct answer _ Acidic
>>The "ion product" is equal to what value? A. 1.0 x 10 - 4 B. 1.0 x 10 - 14 C. 2.1 x 10 - 7 D. 5.6 X 10 - 13 E. None of the above _correct answer _ B. 1.0 x 10 - 14 >>In equilibrium constant expressions, the double brackets [ ] indicate: _correct answer _ Concentration in molarity >>A pH = 5.0 indicates a concentration of OH- (in M) of. A. 5 B. 10 - 5 C. 10 - 9 D. 10 - 1 E. 101 _correct answer _ C. 10 - 9 Use anti log and Kw
>>Three identical molecules dissolve in water. Each molecule contains both a polar portion and nonpolar portion of structure. The three molecules interact in such a way that the nonpolar sections align. This is an example of the. _correct answer _ Hydrophobic effect >>(Short Response) How does the strength of a covalent bond compare to the strength of London Forces and hydrogen bonds? Briefly comment on these differences. _correct answer _ A typical covalent bond is around 400 kcal, while a London force is less than 1 kcal. So, a covalent bond is at least 400 times the size a London force. The hydrogen bond strength is between 12 and 16 kcal, which makes the covalent bond about 40 times a hydrogen bon D. Moreover, hydrogen bonds are the strongest non-covalent force, so this is significant. Break and form bonds easily. LF:<1 D-D:0.5- 2 H-Bond:12- 16 Covalent: 400 + >>(Fill in the blanks) At cool temperatures, water vapor turns into liquid
water releasing heat in the process. Fill in the missing blanks, below, regarding this process. Please identify your answers by writing " A." then your answer, "B" then your answer, and so forth. The free-energy change, ΘG, has a A value (choose "+" or "-"). The enthalpy change, B (fill in symbol), has a C value (choose "+" or "-"). The D change, (ΘS), has a E value (choose "+" or "-"). _correct answer _ A) "-" B) ΘH C) "-" D) entropy E) "-" >>(Short Response) What is the hydrophobic effect and how does a clathrate help explain this phenomenon? _correct answer _ The hydrophobic effect helps scientists explain how biological molecules form and interact. For instance, when molecules with both a nonpolar and polar regions dissolve in water, the nonpolar regions pack together. The packing of the nonpolar regions minimizes the interaction with water and the polar region interact with water, which in total is called the hydrophobic effect. The driving force behind this effect is the spontaneous drive of water to bind to itself through hydrogen bonds. To maximize the hydrogen bonds, water orders itself around the hydrophobic portion of the nonpolar regions in a cage structure also called a clathrate. In so doing, water can form bonds
