You need to login first

Login information

Haven't yet registered?

×
* * * *

Support Us

If you found our community helpful, your small donation will continue to help us reach more students around the globe. You may also like us on Facebook or follow us on Twitter.
Pages: 1     Go Down
  New Topic  |  Print  
Bio Questions
Read 14597 times | 9 Replies | Average Rating: Not Rated Yet
psiu2
Lancelet
*
Posts: 3
Points: 70
Rep:  +0   -0


For a more comfortable homework help experience, try HomeworkClinic.com.
Which Complex carbohydrate contains only a-1, 4-glycosidic linkages?
A) Amylopectin
B) Cellulose
C)Amylose
D) Glycogen
E)Glucose

Which of the following complex carbohydrates is listed with its correct function?
A) Chitin:constituent of bacterial cellwalls
B) Cellulose: structural component of plant cell walls
C) amylose:main componenty of plant starch
D) Starch: Primary energy - Storage molecule in animals
E)Amylopectin: Key structural component in the exoskeleton of insects
I think its D,

 Which polysaccharide contains a modified monosaccharide?
A. Cellulose
B. Peptidoglycan
C. Glycogen
D. Starch
E. None of the above

7. How can a lipid be distinguished from a sugar?
A. Lipids are mostly highly charged.
B. A lipid dissolves in water.
C. Lipids are mostly nonpolar.
D. A lipid is made up of only hydrocarbons.
E. Lipids have many hydroxyl groups on them compared to sugars.


8. Which of the following particles could diffuse easily through a cell membrane?
A. Glucose
B. Hydrogen ion (H+)
C. Sodium ion (Na+)
D. Oxygen (O2)
E. None of these molecules easily pass through cell membranes


9. Which statement is true?
A. Prokaryotic organisms lack ribosomes
B. Chloroplasts lack any internal membranes
C. Prokaryotic ribosomes are composed of a large subunit and a small subunit
D. Flagella enable movement of the nucleus within a prokaryotic organism
E. There are typically between 10-20 ribosomes in a prokaryotic cell.


10. Which of the following are not in or part of a nucleus?
A. Euchromatin
B. Heterochromatin
C. Nucleolus
D. nuclear pores
E. They are all part of or in the nucleus

11. Which polymers are composed of amino acids?
A. Monomers
B. Carbohydates
C. Proteins
D. Nucleic acids
E. Lipids

12. Which of the following is not attached to the central carbon atom in an amino
acid?
A. A carboxyl functional group
B. An amino functional group
C. A side chain ("R group")
D. An oxygen
E. They are all attached to the central carbon atom in an amino acid.

13. Which of the following statements about the formation of polypeptides from
amino acids is true?
A. Polypeptides form by condensation or hydrolysis reactions.
B. A bond can form between any carbon and nitrogen atom in the two amino
acids being joined.
C. The reaction occurs through the addition of a water molecule to the amino
acids.
D. A bond forms between the carboxyl functional group of one amino acid and
the amino functional group of the other amino acid.
E. The reaction always involves a link with a carbohydrate.

14. What scientific hypotheses can be tested by a pulse-chase experiment?
A. Movement of molecules through a cell over time
B. Molecular zip code of a protein
C. Solubility of a molecule
D. The steady-state amount of protein in a cell
E. Enzyme concentration within a cell

15. What is the first step in a pulse-chase experiment?
A. Incubating cells with a labeled molecule
B. Preparing cells for electron microscopy
C. Examining cells for the location of the labeled molecules
D. Incubating cells with an unlabeled molecule
E. None of the above


16. What path does a protein in the secretory pathway take, starting from its site
of synthesis?
A. Rough ER, secretory vesicles, Golgi apparatus, plasma membrane
B. Golgi apparatus, rough ER, secretory vesicles, plasma membrane
C. Rough ER, Golgi apparatus, secretory vesicles, plasma membrane
D. Plasma membrane, secretory vesicles, Golgi apparatus, rough ER
E. Plasma membrane, Golgi apparatus, rough ER, secretory vesicles


17. During a pulse-chase experiment, photographic emulsions were prepared at
different times during the chase, and radioactive spots were detected at the
following times and locations: 5 minutes: rough ER; 10 minutes: Golgi apparatus;
40 minutes: endosomes; 70 minutes: lysosomes; 140 minutes: lysosomes. Which
of the following conclusions can be drawn from these results?
A. The proteins did not travel through the Golgi apparatus.
B. The proteins traveled from lysosomes to endosomes.
C. The proteins were secreted.
D. The final destination of the proteins was the lysosome.
E. The proteins regulated the function of a critical gene in the nucleuls


18. Which of the following statements is true of the bonds in a water molecule?
A. Oxygen acts as the electron acceptor and is oxidized.
B. The electron in each hydrogen atom is completely transferred to the oxygen
atom, and each hydrogen atom has a net charge of +1.
C. Oxygen holds electrons more tightly than hydrogen does, and the net charge
is zero.
D. There is equal sharing of the electrons between the oxygen atom and the two
hydrogen atoms, and the net charge is zero.
E. None of the above.

19. For what discovery is Osamu Shimomura best known?
A. Discovery of the molecule green fluorescent protein
B. Creator of the compound microscope
C. Discovery of antibacterial resistance
D. Discovery of small energetic molecules in distant solar systems
E. Creator of amino acids from small precursor molecules.

20. Martin Chalfie was the first person to accomplish what?
A. extraction of green fluorescent protein from jellyfish
B. expression of green fluorescent protein in bacteria and other cells
C. modification of green fluorescent protein to fluoresce with a red color
D. pulse-chase experiment to examine the location of proteins in a cell
E. none of the above

21. Propose a function for cells that contain extensive smooth endoplasmic
reticulum
A. production and processing of fatty acids and other lipids
B. movement of the cell by cell crawling
C. storage of large amounts of starch
D. production of large amounts of muscle proteins after exercise
E. none of the above

22. Eukaryote cells in a multicellular organism do not generally have which of the
following?
A. Chromosomes
B. DNA
C. Nucleus
D. flagella
E. ribosome

23. What is the molecular formula for peroxide?
A. H20
B. COH
C. COOH
D. H2O2
E. HOHOH


Match the listed items below with the terms that follow:
24. primary structure
25. secondary structure
26. tertiary structure
27. quaternary structure
28. peptide bond

A. hemoglobin’s four subunits
B. van der Waal interactions between hydrophobic groups
C. hydrogen bonds between amino and carboxyl ends of amino acids
D. a portion of a protein that is composed of lysine-lysine-arginine
E. a link between nitrogen and carbon


29. The lysosome is characterized by
A. A highly acidic interior
B. The presence of many ribosomes
C. many proteins that are to be secreted from the cell
D. having a nucleolus
E. the presence of many mitochondria

30. Which are components of the cell’s cytoskeleton?
A. Actin filaments
B. intermediate filaments
C. microtubules
D. All of the above
E. None of the above

31. Microtubules interact with what protein to ferry vesicles from one place in the
cell to another?
A. Actin filaments
B. intermediate filaments
C. kinesin
D. catalase
E. glucose

32. Which of the following typically distinguish animal from plant cells?
A. Presence of mitochondria
B. Presence of a cell membrane
C. Presence of a cell wall
D. Presence of a mitochondria
E. Presence of ribosomes

33. A vacuole in a plant cell
A. indicates a diseased and dying cell
B. Is always present in the nucleus of the cell
C. could act as a storage area for oils, carbohydrates, water or toxins
D. indicates a problem with the chloroplast
E. usually is where the cell nucleus is located

34. One common use of a centrifuge would be to
A. follow the passage of proteins as they travel in a cell with time
B. Reveal the structure of the plasma membrane
C. separate and isolate various organelles of a cell
D. Allow cells and proteins to be labeled with fluorescent indicators
E. none of the above

35. If 10 amino acids are strung together, the potential variety of polymers that
could be produced is about
A. 10
B. 10,000
C. 10 million
D. 16,500 billion
E. infinite


Match the functional group with its property
36. hydroxyl group
37. sulfhydral group
38. carboxyl group
39. carbonyl group
40. amino group

A. acts as a base – tends to attract a proton
B. reacts with compounds of the form HR2 to produce larger molecules
C. acts as an acid – tends to lose a proton
D. when present can form disulfide bonds that can contribute to protein
Structure
E. highly polar, so makes compounds more soluble through hydrogen
bonding with water.

41. In a polypeptide, what is most responsible for the secondary structure called
an alpha helix?
A. The sequence of amino acids
B. hydrogen bonds that form between carboxyl and amino groups on different
residues
C. hydrogen bonds and other interactions between side chains
D. the number, identity, and arrangement of polypeptides that make up a
protein.
E. None of the above


42. By convention, biologists write the sequence of amino acids in a polypeptide
in which direction?
A. carboxy-to amino terminus
B. amino-to carboxy terminus
C. polar residues to non-polar residues
D. charged residues to uncharged residues
E. none of the above


43. A mutation results in the substitution of a glycine in place of an alanine in
one spot in a protein. The likely change in the protein is likely to be
A. Very small
B. Moderately disruptive
C. Quite disruptive


44. A mutation results in the substitution of a glutamate in place of a valine in
one spot in a protein. The likely change in the protein is likely to be
A. Very small
B. Moderately disruptive
C. Quite disruptive


45. Enzymes are catalysts that work by
A. lowering the energy of the reactants
B. raising the energy of the reactants
C. lowering the energy of the products
D. raising the energy of the products
E. lowering the energy needed to reach the transition state


46. Which of the following were NOT high energy molecules produced in the
experiments done by Stanley Miller?
A. amino acids
B. formaldehyde
C. cyanide
D. carbon dioxide and ammonia
E. They were all produced during the experiments


47. A compound binds to a site on an enzyme where the substrate for a reaction
normally binds. This results in
A. Allosteric inhibition
B. Competitive inhibition
C. Cooperative inhibition
D. Non-cooperative inhibition
E. unilateral inhibition


 The compounds glucose and galactose differ in
A. the number of carbons
B. the number of OH groups
C. the number of double bond oxygens
D. the amino portion of the compound
E. the position of a single OH group


 When two glucose molecules are joined together, what is formed?
A. a peptide bond
B. a disaccharide
C. starch
D. water
E. B & D


 Penicillin acts by
A. disrupting hydrogen bonds between carbohydrates
B. inhibiting DNA synthesis
C. blocking the action of an enzyme which links strands of carbohydrates
together via peptide bonds
D. inhibiting the formation of glycosidic linkages
E. increasing the strength of the bacterial cell wall.

Report this PostReport Abuse
replies
Reply# 1
Posts: 562
Points: 3327
Rep:  +19   -3

4 years ago

hi psiu2!

1. a) Amylose - Answer.

a-1,4-glycosidic linkages and a-1,6-glycosidic linkages in amylopectin and glycogen.
beta 1,4-glycosidic linkages in cellulose.

What textbook is this for?



Report this PostReport Abuse
 
Reply# 2
Posts: 562
Points: 3327
Rep:  +19   -3

4 years ago

2.

B) Cellulose: structural component of plant cell walls



Report this PostReport Abuse
 
Reply# 3
Posts: 3
Points: 70
Rep:  +0   -0

4 years ago

biological science freeman 4th edition. thanks for all the help so far!!



Report this PostReport Abuse
Reply# 4
Posts: 562
Points: 3327
Rep:  +19   -3

4 years ago

does it have a penguin in front of the textbook?



Report this PostReport Abuse
 
Reply# 5
Posts: 3
Points: 70
Rep:  +0   -0

4 years ago

yupp thats the one.



Report this PostReport Abuse
Reply# 6
Posts: 562
Points: 3327
Rep:  +19   -3

4 years ago

7. How can a lipid be distinguished from a sugar?
A. Lipids are mostly highly charged.
B. A lipid dissolves in water.
C. Lipids are mostly nonpolar.
D. A lipid is made up of only hydrocarbons.
E. Lipids have many hydroxyl groups on them compared to sugars.



Report this PostReport Abuse
 
Reply# 7
Posts: 562
Points: 3327
Rep:  +19   -3

4 years ago

When two glucose molecules are joined together, what is formed?
A. a peptide bond
B. a disaccharide
C. starch
D. water
E. B & D

8. Which of the following particles could diffuse easily through a cell membrane?
A. Glucose
B. Hydrogen ion (H+)
C. Sodium ion (Na+)
D. Oxygen (O2)
E. None of these molecules easily pass through cell membranes

but rather than having me go through all these, why don't you mark down the ones you are having trouble with, since most of them seem straight forward.

Sarah



Report this PostReport Abuse
 
Reply# 8
Posts: 155
Points: 1874
Rep:  +14   -1

4 years ago

 Penicillin acts by

The compounds glucose and galactose differ in
A. the number of carbons
B. the number of OH groups
C. the number of double bond oxygens
D. the amino portion of the compound
E. the position of a single OH group

42. By convention, biologists write the sequence of amino acids in a polypeptide
in which direction?
A. carboxy-to amino terminus
B. amino-to carboxy terminus
C. polar residues to non-polar residues
D. charged residues to uncharged residues
E. none of the above

33. A vacuole in a plant cell

Which of the following complex carbohydrates is listed with its correct function?
A) Chitin:constituent of bacterial cellwalls
B) Cellulose: structural component of plant cell walls
C) amylose:main componenty of plant starch
D) Starch: Primary energy - Storage molecule in animals
E)Amylopectin: Key structural component in the exoskeleton of insects

9. Which statement is true?




Report this PostReport Abuse
Reply# 9
Posts: 4108
Points: 4094
Rep:  +6   -0

4 years ago

The compounds glucose and galactose differ in
A. the number of carbons
B. the number of OH groups
C. the number of double bond oxygens
D. the amino portion of the compound
E. the position of a single OH group

 When two glucose molecules are joined together, what is formed?
A. a peptide bond
B. a disaccharide
C. starch
D. water
E. B & D

 Penicillin acts by
A. disrupting hydrogen bonds between carbohydrates
B. inhibiting DNA synthesis
C. blocking the action of an enzyme which links strands of carbohydrates
together via peptide bonds

D. inhibiting the formation of glycosidic linkages
E. increasing the strength of the bacterial cell wall.



Report this PostReport Abuse
 
Pages: 1     Go Up New Topic Print
 
Related Topics
Replies Author Last post
3
Replies
Other | Started by livestrong136 | Views: 1610
Last post Last post by livestrong136
3 years ago
3
Replies
Last post Last post by carielynn
A year ago
0
Replies
Study Guides and Resources | Started by Bioforlife | Views: 287
Last post Last post by Bioforlife
A year ago
1
Reply
Physics and Astronomy | Started by jazzflower92 | Views: 42
Last post Last post by bio_man
4 weeks ago
Note: This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.