SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
MCAT Biology 3
Start Test
Study First
Subjects
:
mcat
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Glycoproteins that forms a complex web that forms a protective layer of the surface of animal cells
Proteoglycans
Glycoproteins
Transport disaccharides (reasoning)
Glycolipids
2. Adenine --- Thymine (DNA) - Adenine --- Uracil (RNA) - Guanine --- Cytosine
Miller - Urey experiment
Anchoring junction
Complimentary bases
Glycosidic bond
3. A three carbon alcohol in which each carbon is attached to a hydroxyl group
Phosphdiester bond
Glycerol
Alpha glucose ring
Actin - microtubules - intermediate filaments
4. Laid down when a plant cell is still growing; composed of chitin in fungi and cellulose in plants and protists
Glycogen
Primary cell wall
Collagen
Differences between RNA and DNA
5. Small single - celled organisms that lack a definite nucleus and distinct interior compartments; they are encased within a rigid cell wall. Two main groups are archaebactera and bacteria
Nonpolar amino acids
Prokaryote
Extracellular matrix
Integrins
6. The connection beteween two plasma membranes of plant cells
Plasmodesmata
Glycosidic bond
Cell Theory
Domains
7. A group of about 20 lipids that are modified fatty acids - 5- carbon ring w/ 2 nonpolar tails.
Gram positive bacteria
Prostaglandin
Amylose
Dynein
8. A glucose ring formed with the hydroxyl group in the opposite plane of the methanol group
Monosaccharide
Alpha glucose ring
Amino acid (composition)
Primary level of protein structure
9. The most stable and durable element of cytoskeletal structure; includes vimentin - keratin - and neurofilaments
Kinesin
Methanogens
Intermediate filaments
Secondary cell wall
10. Term for the beta - alpha - beta motif that is found at the core of nuceotide binding sites
Bacteria
Aromatic amino acids
Tight junctions
Rossman fold
11. Phenyalanine - Tryptophan - Tyrosine
Purines (characteristics)
5 classes of amino acids
Archaebacteria
Aromatic amino acids
12. A cluster in the nucleus of ribosomal RNA genes - ribosomal proteins - and the RNAs they produce: it is the site of mass ribosome production
Actin (functions in cytoskeleton)
C - H - O - N - S
Domains
Nucleolus
13. Level of protein structure that involves the association of two more more separate polypeptide chains (the individual chains are referred to as subunits)
First law of thermodynamics
Quaternary level of protein structure
Kinesin
Plasmodesmata
14. A glucose ring formed with the hydroxyl group in the same plane as the methanol group
5 classes of amino acids
Beta glucose ring
Fat (characteristics)
Centrosome
15. The final folded shape of a globular protein -- positions folds nonpolar side groups within the interior
Cenriole
Tertiaty level of protein structure
C - H - O - N - S
Antiport
16. The exact sequence of amino acids specified by DNA
Bacteriorhodopsin
Joule <--> Calorie (conversion)
Primary level of protein structure
Hydrolysis
17. Adenine and Guanine
Glycogen
Phospholipid (composition)
Purines (identify)
Pyrimidines (identify)
18. The bond between two sugar molecules
Nonpolar amino acids
Major categories of macromolecules
Primary level of protein structure
Glycosidic bond
19. Transmembrane proteins that play an important role in cell - cell adhesion; their function is dependent upon calcium; vertebrate migration of neurons is affected by which type of this protein is expressed on the cell's plasma membrane
Pinocytosis
Denaturation
Nonpolar amino acids
Cadherin
20. A type of anchoring junction that connects the cytoskeletons of adjacent cells
Chromosome
Extreme halophiles
Monosaccharide
Desmosomes
21. Methane - producing archaebacteria - one of the most primitive archaebacteria that are alive today
Methanogens
Bacteria
Chromosome
Adherins junctions
22. Most abundant protein found in vertebrate body; forms matrix of skin - ligaments - tendons - and bones; found in the ECM
Carbohydrates (empirical formula)
Glycolipids
Chitin
Collagen
23. The bond between the hydroxyl group of one nucleotide and the phosphate group of another.
Hypercholesterolemia
Phosphdiester bond
Cell Theory
Cenriole
24. Cytosine - Uracile - Thymine
Pyrimidines (characteristics)
Methanogens
Pyrimidines (identify)
Hydrolysis
25. The inward movement of one molecule is coupled with the outward movement of another (across the cell membrane)
Countertransport
Tertiaty level of protein structure
Motifs
Plastids
26. A special motor protein that moves along the microtubule toward the negative end; responsible for rentrograde axoplasmic transport
Dynein
Quaternary level of protein structure
Cadherin
Tight junctions
27. 1. All organisms are composed of one or more cells 2. Cells are the smallest living things - the basic units of organization of all organmisms 3. Cells arise only by division of a previously existing cell
Pyrimidines (identify)
Cell Theory
Starch
Tertiaty level of protein structure
28. 1 joule = 0.239 calories
Joule <--> Calorie (conversion)
Microtubules
Actin (functions in cytoskeleton)
Disaccharide
29. Glutamic acid - Aspartic acid - Histidine - Lysine - Argenine
Extreme thermophiles
Rossman fold
Charged amino acids
Adherins junctions
30. Components of cytoskeleton
Clathrin
Actin - microtubules - intermediate filaments
Gram positive bacteria
Antiport
31. 5 carbon sugar (ribose or deoxyribose) bound to a phosphate and a nitrogenous base
Purines (identify)
Purines (characteristics)
Nucleotide (composition)
Integrins
32. Organelles found in plants and algae that perform photosynthesis and act as storage units; they all arise from the division of themselves
Archaebacteria
Glycogen
Extracellular matrix
Plastids
33. Nonpolar - polar uncharged - charged - aromatic (nonpolar and polar uncharged) - special function
Actin - microtubules - intermediate filaments
Secondary level of protein structure
5 classes of amino acids
Purines (characteristics)
34. A common feature of porin proteins; beta sheets that forma characteristic motif where the sheets form a barrel - like structure
Primary cell wall
DNA (location)
Tight junctions
Beta barrel
35. Gram positive bacteria have a think - single - layered cell wall that retains the dye used in Gram - staining. Penicillin only works on gram - positive bacteria.
Phospholipid (composition)
Pyrimidines (characteristics)
Bacteria
Gram positive bacteria
36. Catalysis (enzymes) - Defense/recognition (immune and hormonal systems) - Transport (eg hemoglobin) - Support (eg collagen) - Motion (actin and myosin) - Regulation (hormones) - Storage (eg bound calcium and iron)
Desmosomes
Nucleotide (composition)
Chitin
Functions or proteins
37. Eukaryotic cell's internal protein scaffold which provides structural support and is extremely important for organizing the cell's activites; a dynamic system that is constantly forming and disassembling
Purines (characteristics)
Cytoskeleton
Plasmodesmata
Peptidoglycan
38. The second major group of prokaryotes that have very strong cell walls and are photosynthetic
Peptidoglycan
Desmosomes
xtrusion
Bacteria
39. Biological process in which a some single celled prokaryotes collect intracellular water with a contractile vacuole and then pump it out
Hydrocarbons
xtrusion
Prostaglandin
Carbohydrates (empirical formula)
40. (CH2O)n - n = number of carbon atoms
Pyrimidines (characteristics)
Antiport
Purines (identify)
Carbohydrates (empirical formula)
41. Small single - ringed structures: cytosine found in both DNA and RNA - uracil found in RNA - and thymine found in DNA
Archaebacteria
Pyrimidines (characteristics)
Dehydration synthesis
ATP (composition)
42. A sticky substance that acts as a glue between the primary cell walls of plant cells
Middle lamella
Intermediate filaments
Joule <--> Calorie (conversion)
Purines (identify)
43. A structural starch that is a string of beta glucose molecules; it is the chief structural component of plant cell walls. Starch - degrading enzymes that occur in most organisms cannot break the bond between two beta - glucose molecules.
Cellulose
Glycoproteins
Centrosome
Phospholipid (composition)
44. A special motor protien that moves along the microtubule toward its positive end; in most cells this movement is from the center to the periphery - in the axon it is anterograde transport
Quaternary level of protein structure
Prokaryote
Kinesin
Peptidoglycan
45. Two simple sugars joined together
Cell Theory
Penicillin (mechanism of action)
Disaccharide
Domains
46. A network of integrins that connects the actin filaments of one cell with those of neighboring cells or with the extra cellular matrix
Glycerol
Adherins junctions
Secondary level of protein structure
Steriod
47. Glycine - Serine - Threonine - Asparagine - Glutamine
Extreme halophiles
Antiport
Purines (characteristics)
Polar uncharged amino acids
48. The unfolding of a protein caused by a shift in pH - ion concentration - or temperature.
Tertiaty level of protein structure
xtrusion
Denaturation
Primary level of protein structure
49. They connect the plasma membranes of adjacent cells in a sheet - preventing molecules from leaking between the cells.
5 classes of amino acids
Tight junctions
Nonpolar amino acids
Archaebacteria
50. A modified form of cellulose with a nitrogen group added to the glucose units; structural building material found in arthropods and cell walls of many fungi.
Middle lamella
Keratin
Dynein
Chitin