FREE AND STUDY GAMES ABOUT BIO CHAPTER 5 EXAM

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FREE AND STUDY GAMES ABOUT BIO CHAPTER 5 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -83 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: compare the composition, structure, and function of starch and cellulose.What role do they play in the human body

Answer:

they are both polymers of glucose, alpha configuration in starch while beta in cellulose. Different properties from shape. Starch stores energy cellulose is structure. humans can hydrolyze starch but not cellulose for energy instead it helps food pass

Question 2: hormonal proteins

Answer:

coordination of an organism's activities such as insulin which causes uptake of glucose

Question 3: differ between alpha and beta

Answer:

in alpha, the ohs are next to eachother while in beta a hydrogen is in between Question 4: where would you expect a polypeptide region that is rich in the amino acids valine, leucine, and isoleucine to be located in the folded polypeptide?

Answer:

all nonpolar amino acids, so you would expect this region to be located in the interior of the folded polypeptide, where it would not contact the aqueous environment inside the cell

Question 5: give an example of a nonpolar and a polar amino acid

Answer:

Leucine as nonpolar and glutamine as polar

Question 6: what are the two families of nucleotides and their differences

Answer:

pyrimidine(c,t,u) and purines(AG): AGC=DNA and rna while T= only dna and U= only RNA Question 7: name a pair of base sequences that could form a short stretch of a normal double helix of DNA

Answer:

5'AtGc-3' with 5'GCAT-3' Question 8: what role does the complementary base pairing play in the functions of nucleic acid

Answer:

pairing of two strands of DNA makes possible the precise replication of DNA every time a cell divides, ensuring that gentic info is faithfully transmitted. RNA allows complementary base pairing enabling rna assume specific three d shapes for function

Question 9: tertiary structure

Answer:

the overall shape of a polypeptide resulting from interactions between the side chains of the various amino acids.

Question 10: explain hydrophobic reaction

Answer:

nonpolar amino acids cluster in the center of the protein away from water which allows for hydrogen bonds of the polar side chains to be made to solidify the tertiary structure Question 11: what parts of a polypeptide participate in the bonds that hold together secondary structure? Tertiary Structure?

Answer:

secondary structures involves hydrogen bonds between atoms of the polypeptide backbone and tertiary structure involves interaction between atoms of the side chains of the amino acid subunit

Question 12: what allows for polymers to be so diverse

Answer:

different arrangement

Question 13: what are carbohydrates monomer?

Answer:

monosaccharides (carbon hydrogen and oxygen) Question 14: how does a phospholipid shield their hydrophobic portion from water

Answer:

they self assemble in water into double layered structures "bilayers" as a shield. The hydrophilic region takes the outside as a boundary while hydrophobic is safe inside

Question 15: give examples of conditions that can change a proteins function

Answer:

ph salt concentration, temperature, other aspects of environment change, weak bonds are destroyed causing unraveling

Question 16: explain how the backbone affects the nitrogenous bases

Answer:

the bases are in the middle so the backbone protects

Question 17: receptor proteins

Answer:

respond to chemical stimuli like receptors in nerve cells signaling molecules released by other nerve cells

Question 18: lipids are similar because?

Answer:

most are nonpolar and hydrophobic because they are mostly made of hydrocarbons

Question 19: defensive protein?

Answer:

protects against disease like antibodies

Question 20: in regards to saturated and unsaturated fats, which are solid at room temperature

Answer:

saturated are solid at room temperature because they do not have double bonds allowing for tighter packing together

Question 21: what is the most common monosacharide

Answer:

glucose Question 22: what structural level of a protein is least affected by hydrogen bond disruption

Answer:

primary

Question 23: why are human sex hormones considered lipids

Answer:

they are steroids, a type of hydrophobic compound

Question 24: how do amino acids bond?

Answer:

when two amino acids are positioned so that a carboxyl group of one is adjacent to the amino group of they other, the join with a dehydration reaction making a polypeptide backbone

Question 25: what are the monomers of nucleic acid

Answer:

nucleotides which are a phosphate, sugar, nitrogen containing

Question 26: what is at the center of an amino acid

Answer:

an asymmetric carbon called alpha carbon which partners with amino group, carboxy, hydrogen, and variable group R as the side chain

Question 27: contractile/ motor proteins

Answer:

movement like cilia with actin and myosin in contraction of a muscle