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Test your basic knowledge |
CLEP Natural Science
Start Test
Study First
Subjects
:
clep
,
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. Transport of a substance across a cell membrane against the concentration gradient
chromatin
anabolism
filament
active transport
2. A cell having only one complete set of chromosomes
virus
haploid
chromatin
mitosis
3. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
organelles
lysosomes
diploid
interphase
4. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
prophase
centromere
haploid
5. Process of building up complex materials (proteins) from simple materials
filament
interphase
anabolism
tonoplast
6. Projections on cell membrane increase surface area
endosymbiont hypothesis
centrioles
catabolism
microvilli
7. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
nucleosome
gymnosperms
organism
cell membrane
8. Reproductive cells - have only half the number of chromosomes
organelles
vacuole
perennial
gametes
9. Cell division which produces two identical cells
exocytosis
nuclear pores
mitosis
shoot apex
10. The organic process whereby the DNA sequence in a gene is copied into mRNA
haploid
mutation
transcription
transduction
11. Has a nucleus - has organelles or other cell parts
anabolism
eukoryotic cells
secretory vesicles
filament
12. Double-stranded chains of proteins which give structure to the cell
microfilaments
alleles
endoplasmic reticulum
diploid
13. The organ that bears the ovules of a flower - base of the pistil
ovary
interphase
DNA
endosymbiont hypothesis
14. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
codon
reduction
ribosomes
15. A substance that must join with the enzyme to enable it to fit the substrate
carbon dioxide fixation
anther
facilitated diffusion
cofactor
16. Living thing
biosynthesis
active transport
organism
facilitated diffusion
17. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
biennial
cytokinesis
prokaryotes
cristae
18. Proteins that act as biological catalysts
prophase
homologs
enzymes
anaphase
19. (adenosine triphosphate) main energy source that cells use for most of their work
metabolism
stigma
ATP
ribosomes
20. The first stage of mitosis - forming spindle fibres attached to the centromere
transduction
fermentation
prophase
cytokinesis
21. Sequence of DNA that codes for a protein and thus determines a trait
gene
golgi apparatus
anther
shoot apex
22. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
virus
post-transcriptional processing
angiosperms
codon
23. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
endocytic vesicles
microvilli
facilitated diffusion
lysosomes
24. Formed when cell membrane surrounds a molecule outside the cell and ingests it
eukoryotic cells
pedicel
endocytic vesicles
metabolism
25. Matching Chromosomes that are similar but not identical
homologs
microvilli
cell
biosynthesis
26. Division of the cytoplasm during cell division - new cell is formed
filament
homologs
cytokinesis
pistil
27. Area where the chromatids of a chromosome are attached
cell wall
centrioles
cofactor
centromere
28. Cells that lack a membrane-bound nucleus and membrane-bound organelles
telophase
prokaryotes
translation
transduction
29. Production of a chemical compound by a living organism
reduction
biosynthesis
codon
photolysis
30. Classication of plant which produce seeds which are 'naked' (in cones)
stamen
lysosomes
cell membrane
gymnosperms
31. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
lysosomes
fermentation
nuclear pores
codon
32. Green pigment contained in the grana
haploid
tonoplast
stigma
chlorophyll
33. Classification of plant which survives only a single season
biennial
annuals
organelles
electron transport
34. Body of a chloroplast containing grana
krebs cycle
prosthetic group
stroma
golgi apparatus
35. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
haploid
vascular plants
angiosperms
36. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
endoplasmic reticulum
krebs cycle
carbon dioxide fixation
microtubules
37. Small - dense region within most nuclei in which the assembly of RNA proteins begins
organism
alleles
nucleolus
transcription
38. Different forms of a gene
alleles
pedicel
shoot apex
cytoskeleton
39. Plants that grow year after year
cofactor
perennial
nucleolus
photolysis
40. Two identical chromosomes that split and contain the same genetic material
microvilli
chromatids
electron microscope
cristae
41. Vacuole membrane
cell cycle
microvilli
tonoplast
gymnosperms
42. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
anabolism
filament
chlorophyll
43. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
inhibitor
anaphase
vascular plants
endosymbiont hypothesis
44. Stores - packages and ships proteins
cell wall
haploid
chromatin
golgi apparatus
45. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
cell wall
telophase
mitochondria
metabolism
46. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
biennial
electron microscope
annuals
centrioles
47. Uses electrons from the Krebs cycle to change ADP to ATP (cytochromes on surface of cristae of mitochondria - contain protein and heme (iron containing) groups - electrons pass along them and ATP is produced)
electron transport
cofactor
vacuole
cytoskeleton
48. An internal membrane system in which components of cell membrane and some proteins are constructed. rough - instrumental in protein synthesis; smooth - processes lipids fats and steroids
endoplasmic reticulum
centromere
cofactor
ovules
49. Modification of a cell by the incorporation of exogenous DNA
prosthetic group
ovary
chromatids
transformation
50. Sticky portion at the top of the style which traps pollen
stigma
cell cycle
endosymbiont hypothesis
transcription