What is the significance of carbon having four valence electrons?(1 point)
The outermost shell can only bond with hydrogen.
The outermost shell is full, making it a stable.
The outermost shell can form up to four covalent bonds.
The outermost shell never fills making it unstable.
Biochemistry Unit Test | September 2nd 2022
1: B | The outermost shell can form up to four covalent bonds.
2: A | a large chain of carbons and hydrogens bonded together
3: C | They are made of carbon, oxygen, and hydrogen.
4: B | the R group
5: B | starch
6: A | amino acid
7: B | 6H2O + 6CO2 → C6H12O6 + 6O2
8: A | inputs
9: C | stays the same
10: C | the stomach because it breaks down nutrients and releases energy for the body
11: D | consistency
The rest you are on your own :)
Anyone know the full test?
Can anyone post the answers and questions in word form so we don't get mixed up 😭
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c is the answer
11: In 3-5 sentences, explain how the rate of photosynthesis or cellular respiration can be measured using products or reactants.
You can find the rate of photosynthesis by weighing the nitrogen content before and after measurement. According to the lessons, nitrogen is the easiest to measure during photosynthesis. Cell Respiration rate can be found using a similar process, but with hydrogen instead of nitrogen.
12: In 3-5 sentences, explain how the nutrients in what you eat contribute to your body's biochemistry.
Nutrients may be defined as a type of substance that delivers nourishment that is essential for the proper maintenance of life and for growth. The categories of nutrients include proteins, fats, carbohydrates, vitamins, minerals, etc. Out of the given categories of nutrients, each has its own specific role that contributes to the overall biochemistry of the body.
13: A substance is dissolved in water, and the temperature of the surroundings decreases. Is this process exothermic or endothermic? Explain your reasoning in 3-5 sentences.
The process of dissolving is endothermic when less energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because less energy is released than is used, the molecules of the solution move more slowly, making the temperature decrease.
14:Your friend asks for your help checking their essay about sugar production and use in plants. They have found an online encyclopedia stating that plants produce glucose via photosynthesis. Glucose is linked together to form the carbohydrate starch. They are confused, though, because a university website states that glucose is linked together to form cellulose, the main part of plant cell walls.
In 3–5 sentences, describe how you can help your friend check their information and how both statements can be true.
Both statements are true! Starch and cellulose have the same repeat units dependent on glucose, and are composed of the same glucose and monomer. These substances are found mainly in plants. They are very large molecules macro molecules formed by the condensation of hundreds of simple sugar molecules called glucose. Photosynthesis is the process by which green plants are able to use sunlight as source of energy to manufacture their own food glucose. These simple sugars glucose are transportable products formed in plant cells during photosynthesis. These can be converted to starch and stored as starch grains in plant cells or as cellulose found in the plant cell wall.
15: A significant change in temperature or pH can change the shape of an enzyme’s active site.
Explain why a change in the shape of an active site denatures an enzyme, and discuss the impact on the chemical reaction that relies on an enzyme that has been denatured. Write 3-5 sentences.
When the particles mix with other types of substances the Enzymes will collect the proteins causing the main object to Rust, Desolve, or liquify, sometimes even harden. But in the cases of it denaturing would be for the enzyme to eat up unwanted nutrients or germs like alcohol would for a wound, disinfecting or preventing the item from becoming sick, molding, Ect.
I hope this helps with the essays part!!!!!
1(c) . The outermost shell can only bond with hydrogen
2.(c) a large chain of carbons and hydrogen bonded together
3.(D) they are made of carbon,oxygen, and hydrogen
4.(C) the R group
5.(A) starch
6.(A) amino acids
7.(c) 6H20+6CO2 C6H1206+602
8.(B) inputs
9.(C) stays the same
10.(C) the stomach because it breaks down nutrients and releases energy for the body
11.(A) consistency.
The others is Essay