Some practice bio q's check'em out

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.
H

hope_to_match

Full Member
10+ Year Member
Joined
Feb 7, 2011
Messages
1,145
Reaction score
220
Members do not see this ad.
Alright..I decided to post a few biology questions for you guys. I am currently working my way through cliffs (second time around). As I said in my earlier post, I will post some questions which might include details that might be overlooked by most of us..These questions are based purely on the things I overlooked the first time I read through cliffs..and you might think these are easy and silly..but hey..never hurts to see these twice right 🙂

These are based on Chapters 1 and 2 from Cliff:

Q1: Which of the following glycosidic linkages are humans not able to break down?
a. alpha-glycosidic linkage
b. beta-glycosidic linkage

Q2: Casein, ovalbumin, and zein are examples of what kind of proteins?
a. transport proteins
b. structural proteins
c. storage proteins
d. defensive proteins
e. they have properties of all of the above

Q3: Keratin, collagen, and silk are examples of what kind of proteins?
a. transport proteins
b. structural proteins
c. storage proteins
d. defensive proteins
e. they have properties of all of the above

Q4: Proteins whose shape is dominated by secondary structure of a protein often form______ and are _______ in water
a. globular proteins, insoluble in water
b. fibrous proteins, insoluble in water
c. fibrous proteins, soluble in water
d. globular proteins, soluble in water

Q5: The most common substance in extracellular matrix is...
a. cholesterol
b. collagen
c. keratin
d. casein

Well I guess that's it for today. Let me know if you guys like this and I can keep posting these as I continue working my way through cliffs.. if not oh well 🙂
 
Sort by date Sort by votes
b, c, b, d, b

Q4 is the only one I'm not sure about.

EDIT: ok, got Q4 wrong. The answer is b: fibrous proteins are dominated by both forms of secondary structure (alpha helix and beta sheet) and are insoluble. Globular proteins are mostly dominated by tertiary structure and are soluble.
 
Last edited:
Upvote 0 Downvote
1. B
2. C
3. B
4. C
5. B

I really like answering these questions Thanks for making them. Keep them coming, please.
 
Upvote 0 Downvote
Illfavor said:
Globular proteins=hemoglobin=dominated by quarternary structure. Fibrous=secondary but I have no idea about solubility.
Click to expand...

Oh yeah, I read it too fast. I thought the protein is a secondary structure. Multiple secondary structures such as alpha helices would make it glob.
 
Upvote 0 Downvote
I like that there are a lot of responses! I will post the answers and explanations tomorrow morning so that hopefully more people will take advantage of the post!🙂
 
Upvote 0 Downvote
Here's how I would reason an answer here: Transport proteins have to be water soluble. (Think hemoglobin, lipoproteins, they exist to aid in the movement of things that aren't very soluble). Many transport proteins are globular, so I'm thinking fibrous. Transport proteins are dominated by tertiary/quaternary structure by a function of being globular. If it's dominated by secondary structure, meaning H-bonding, then it's going to have it's hydrophilic aspects on the interior, making it most likely insoluble in water. The great thing about bio is that any one little thing I'm forgetting = missed question haha.
 
Upvote 0 Downvote
b, c, b, ?, b

fourth one is weird.

you guys are awesome study buddies


good explanation for question 4 favor...still don't know if water solluble though
 
Upvote 0 Downvote
Illfavor said:
Globular proteins=hemoglobin=dominated by quarternary structure. Fibrous=secondary but I have no idea about solubility.
Click to expand...

Globular proteins are mostly dominated by tertiary structure, according to Cliffs.

In any case, I think globular/fibrous being dominated by secondary vs tertiary structure is unlikely to be of significance on the exam, it's just a bit of extraneous info - not even Campbell's touches on that.
 
Upvote 0 Downvote
FeralisExtremum said:
Globular proteins are mostly dominated by tertiary structure, according to Cliffs.

In any case, I think globular/fibrous being dominated by secondary vs tertiary structure is unlikely to be of significance on the exam, it's just a bit of extraneous info - not even Campbell's touches on that.
Click to expand...

Yea I clarified that in a later post, and I do not anticipate it being something of concern. Just practicing problem-solving.
 
Upvote 0 Downvote
I agree. It is unlikely to show up on the test, but I think that by bringing these up here, we can all benefit. In my opinion, it never hurts to know a little more
 
Upvote 0 Downvote
Alright so as I promised I will post the answers today: B, C, B, B, B

Q1: B, beta-glycosidic linkages are found in cellulose (which is a structural molecule in the walls of plant cells and is the major component of wood!). We certainly can't digest wood or grass! Alpha-glycosidic linkages are found in energy storage molecules of plant cells ( like starch) and can be broken down by humans.

Q2: C, casein, ovalbumin, and zein are examples of storage proteins. Casein is found in milk, ovalbumin in egg whites, and zein in corn seeds.

Q3: B, Keratin, collagen, and silk are examples of structural proteins. We find keratin in hair, collagen in connective tissue, and silk is found in spider webs.

Q4: B Proteins whose shape is dominated by secondary structure often form fibrous proteins and are insoluble in water. Fibrous proteins are the principle structural proteins of the body, so we don't want them to be soluble in water! They are insoluble, due to R groups being on the outside of the structure because hydrogen bonding occurs on the inside between amino and carboxyl groups of adjacent amino acids). The roles of fibrous proteins include: protection and support, forming connective tissue, tendons, bone matrices, and muscle fiber. Tropocollagen is a good example. This kind of bonding produces alpha-helices and beta pleated sheets. On the other hand, globular proteins are soluble in water and their structure is dominated by the tertiary structure (hydrogen and ionic bonding between functional groups of amino acids, disulfide bonds, and hydrophobic effect). Unlike fibrous proteins (that play a structural function), globular proteins have variety of functions: they act as enzymes, messengers, transporters, but can also play a structural role). Hemoglobin is a good example of a globular protein. It consists of four peptide chains that are held together by various interactions (hydrogen bonding and interactions among functional groups). Hydrophilic amino acids are exposed to water whereas the hydrophobic amino acids are not due to hydrophobic interactions. Therefore, unlike fibrous proteins, globular are soluble in water.


Q5: B, The most common substance in extracellular matrix is collagen. Extracellular matrix is found in animals (between adjacent cells). Matrix provides support and binds adjacent cells together. Therefore, we are most likely to see a structural protein like collagen in the extracellular matrix and it is indeed the most abundant protein there. In general though, extracellular matrix is occupied by fibrous structural proteins, glycoproteins, and adhesion proteins. All of them contribute to the function of the extracellular matrix- mechanical support and binding of adjacent cells together.
 
Last edited:
Upvote 0 Downvote
Alright..here is another set of bio q's. I numbered them to continue with the first set which had questions 1-5. The first question here is question 6. I will post the answers tomorrow!

Q6: Centrioles and basal bodies are made up of ______?
a. 9+2 microtubule pattern
b. nine triplets of microtubules arranged in a circle
c. nine triplets of microfilaments arranged in a circle
d. nine triplets of intermediate filaments arranged in a circle

Q7: Chemical bonds from glucose have high energy bonds because....
a. bonds represent absorbed energy from light with electrons in ground state
b. bonds represent absorbed energy from light with electrons in excited state

Q8: Examples of C-4 plants include _______ and CAM plants include _______
a. C-4= pineapples; CAM= corn
b. C-4= corn; CAM=sugarcane
c. C-4= sugarcane, CAM=pineapple
d. C-4 and CAM include the same plants: pineapples, corn, sugarcane

Q9: Cellular respiration is overall a👎...
a. oxidative process
b. reductive process

Q10: Free energy of a reaction is...
a. changed by the presence of catalyst
b. is not changed by the presence of catalyst
c. changes slightly with the presence of catalyst

Q11: Fats are storage molecules for energy. _____enter(s) glycolysis and _____ enter(s)Krebs Cycle after digestion of fats.
a. glycerol enters glycolysis and pyruvate enters Krebs Cycle
b. when fats are hydrolyzed, they bypass glycolysis and enter Krebs Cycle
c. glycerol enters glycolysis and fatty acids enter Krebs Cycle
d. glycerol enters glycolysis and citrate enters Krebs Cycle

Q12: Proteins can also be a source of free energy. They can be hydrolyzed to amino acids. How do we get energy from proteins?
a. once hydrolyzed, amino acids enter glycolysis and cellular respiration takes place
b. once hydrolyzed, amino acids enter Citric Acid Cycle and cellular respiration takes place
c. once hydrolyzed, the amino group is removed and the remainders of amino acids enter glycolysis
d. once hydrolyzed, the amino group is removed, remainders of amino acids are converted to various substances that enter glycolysis or Krebs Cycle as intermediates and cellular respiration takes place
e. once hydrolyzed, the carboxyl group is removed and enters Krebs Cycle

Q13: Muscle cells are....
a. obligate anaerobs
b. faculative anaerobs
 
Upvote 0 Downvote
6. A
7. A
8. B
9. A
10. B
11. C
12. D
13. B

Wow! This set of questions is tough! I think I missed most of them.
 
Upvote 0 Downvote
Q14: What are the two major differences between receptor tyrosine kinase and G-protein coupled receptor?
a. RTK is directly responsible for transduction pathway and triggers multiple transduction pathways whereas GPCR indirectly activates the transduction pathway and triggers a single transduction pathway
b. RTK is indirectly responsible for transduction pathway and triggers multiple transduction pathways whereas GPCR directly activates the transduction pathway and triggers a single transduction pathway
c.RTK is directly responsible for transduction pathway and triggers single transduction pathways whereas GPCR indirectly activates the transduction pathway and triggers multiple transduction pathways
d. RTK is indirectly responsible for transduction pathway and triggers a single transduction pathways whereas GPCR directly activates the transduction pathway and triggers multiple transduction pathways


Q15: Mitogen is...
a. substance that stimulates meiosis
b. substances that stimulates kinase cascade
c. substance that stimulates mitosis
d. substance that stimulates gated ion receptors to open

Q16: Mutations in which protein are known to cause uncontrolled cell division
a. p40
b. p56
c.p32
d.p53
 
Upvote 0 Downvote
eugeniager said:
q14: what are the two major differences between receptor tyrosine kinase and g-protein coupled receptor?
A. Rtk is directly responsible for transduction pathway and triggers multiple transduction pathways whereas gpcr indirectly activates the transduction pathway and triggers a single transduction pathway
b. Rtk is indirectly responsible for transduction pathway and triggers multiple transduction pathways whereas gpcr directly activates the transduction pathway and triggers a single transduction pathway
c.rtk is directly responsible for transduction pathway and triggers single transduction pathways whereas gpcr indirectly activates the transduction pathway and triggers multiple transduction pathways
d. Rtk is indirectly responsible for transduction pathway and triggers a single transduction pathways whereas gpcr directly activates the transduction pathway and triggers multiple transduction pathways


q15: mitogen is...
A. Substance that stimulates meiosis
b. Substances that stimulates kinase cascade
c. Substance that stimulates mitosis
d. Substance that stimulates gated ion receptors to open

q16: mutations in which protein are known to cause uncontrolled cell division
a. P40
b. P56
c.p32
d.p53
Click to expand...

d,c,d
 
Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

DAT Destroyer
DAT Math DAT Destroyer | Practice Practice!
Replies
0
Views
968
DAT Destroyer
DAT Destroyer
M
Getting near a 30 for Bio, Gchem, and Ochem for DAT
Replies
3
Views
988
Chicago_predental
C
devinatlin
cDAT Practice Manual Invalid Cube Counting Question
Replies
0
Views
951
devinatlin
devinatlin
F
Dat breakdown 23AA, 23TS, 21PAT, 25 OC, 23 Bio, 21 GC, 23 QR, 23 RC
Replies
1
Views
1K
DAT Destroyer
DAT Destroyer
C
DAT Breakdown from 17AA to 19AA, 8pt Bio increase
Replies
1
Views
1K
Na7428
Na7428
Top