FREE BIOLOGY AND STUDY GAMES ABOUT BIO 120 FINAL

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FREE BIOLOGY AND STUDY GAMES ABOUT BIO 120 FINAL

EXAM Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -120 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What form of nucleic acid can exist both in the nucleus and in the cytoplasm?

Answer:

RNA Question 2: Which of the following triggers the cell's passage past the G2 checkpoint into mitosis?

Answer:

MPF Question 3: Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine, and cytosine forms hydrogen bonds with guanine. What is the significance of the structural arrangement?

Answer:

it permits complementary base pairing

Question 4: Why is carbon so important in biology?

Answer:

it can form a variety of carbon skeletons and host functional groups

Question 5: What is true about the citric acid cycle?

Answer:

it makes ATP through substrate-level phosphorylation

Question 6: Meiosis II is similar to mitosis in that...

Answer:

sister chromatids separate

Question 7: Saturated fats____.

Answer:

contain more hydrogen than unsaturated fats that consist of the same number of carbon atoms Question 8: During what phase of meiosis do daughter cells first become haploid?

Answer:

Meiosis I Question 9: Cellular respiration can best be described as:

Answer:

taking electrons from food and giving them oxygen to make water, using the energy released to drive ATP formation Question 10: Which of the following events occur during interphase at the cell cycle?

Answer:

replication of DNA Question 11: Semiconservative replication involves a template, What is the template?

Answer:

one strand of the DNA molecule Question 12: Which of the following statements is true of a species that has a chromosome number of 2n=16?

Answer:

each cell has 8 homologous pairs

Question 13: What is the best explanation for why vegetable oil is liquid at room temperature while animal fats, like butter, are solid?

Answer:

Vegetable oil has more double bonds than animal fats Question 14: Testosterone and estradiol are male and female sex hormones, respectively, in many vertebrates. In what ways(s) do these molecules differ from each other? Testosterone and estradiol___.

Answer:

Have different functional groups attached to the same carbon skeleton Question 15: The tendency of an atom to pull electrons toward itself is referred to as its ____.

Answer:

electronegativity Question 16: Nucleotides are the monomers of nucleic acids, what are the 3 parts of a nucleotide?

Answer:

sugar, phosphate, nitrogen base Question 17: In the polymerization of DNA, a covalent bond is formed between a phosphate group of the new nucleotide being added and which of the following atoms or molecules of the last nucleotide in the polymer?

Answer:

the 3' OH

Question 18: Denatured proteins...

Answer:

are unfolded and biologically inactive Question 19: ATP synthase at the inner mitochondrial membrane makes ATP and water from ADP and phosphate by coupling this to which other process?

Answer:

allowing H+ to move down its electrochemical gradient

Question 20: Why do hydrolysis reactions occur more readily in solutions than dehydration reactions?

Answer:

Hydrolysis reactions are exergonic and increase entropy Question 21: Lactose, a sugar in milk, is a disaccharide composed of one glucose molecule

joined to one galactose molecule. The linkage is best classified as:

Answer:

glycosidic Question 22: NADPH and ATP are ____ during the Calvin Cycle and are sent back to the Light Dependent reactions to be ____ again.

Answer:

Oxidized; reduced Question 23: If you're not getting enough vitamins in your food, what are you missing?

Answer:

coenzymes Question 24: Carbon dioxide is ___ to produce ____ (the end product of the Calvin cycle)

Answer:

Produced; G3P

Question 25: Why is +NaCl- able to become a solution with water?

Answer:

+NaCl- is able to disrupt the hydrogen bonds between the water molecules Question 26: The liver is involved in the detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process, and therefore is abundant in liver cells?-Rough ER -Smooth ER -Golgi Apparatus -Nuclear Envelope

Answer:

Smooth ER