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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. Small structures in the cytoplasm of a cell that do special jobs
microvilli
organelles
prosthetic group
nucleosome
2. Powerhouse of the cell - organelle that is the site of ATP (energy) production
cell
lysosomes
shoot apex
mitochondria
3. Green pigment contained in the grana
inhibitor
stroma
chlorophyll
electron transport
4. Modification of a cell by the incorporation of exogenous DNA
transformation
gene
krebs cycle
organelles
5. Cell organelle filled with enyzmes need to break down certain materials in the cells
glycolysis
lysosomes
homologs
biosynthesis
6. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
microvilli
translation
stigma
transduction
7. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
genome
anabolism
centrioles
electron transport
8. Vacuole membrane
cell cycle
diploid
ovary
tonoplast
9. Change in a DNA sequence that affects genetic information
biosynthesis
mutation
cytoskeleton
genome
10. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
prosthetic group
cristae
cytoskeleton
active transport
11. Membrane-bound organelle that stores water and soluble substances
stamen
vacuole
krebs cycle
mitochondria
12. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
crossing over
anther
organelles
grana
13. The female part of a flower composed of ovary and style and stigma and ovules
pistil
organelles
cell wall
stroma
14. 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
cell
endoplasmic reticulum
mutation
cytokinesis
15. A substance that retards or stops enzymatic activity
cytoskeleton
endosymbiont hypothesis
metabolism
inhibitor
16. Division of the cytoplasm during cell division - new cell is formed
cytokinesis
krebs cycle
eukoryotic cells
electron transport
17. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
biosynthesis
electron transport
inhibitor
virus
18. In photosynthesis - this is the splitting of water by light
gametes
reduction
cell membrane
photolysis
19. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
pistil
codon
shoot apex
biosynthesis
20. Matching Chromosomes that are similar but not identical
homologs
mutation
pedicel
stroma
21. Smallest unit of most living things
alleles
microtubules
cell
cristae
22. Used to examine tiny cell organelles
electron microscope
cell cycle
gametes
angiosperms
23. Has a nucleus - has organelles or other cell parts
eukoryotic cells
facilitated diffusion
biosynthesis
lysosomes
24. The second phase of mitosis - during which the chromosomes line up across the center of the cell
codon
enzymes
reduction
metaphase
25. Formed when cell membrane surrounds a molecule outside the cell and ingests it
endocytic vesicles
genome
anaphase
photolysis
26. Production of a chemical compound by a living organism
endosymbiont hypothesis
biosynthesis
ovary
nuclear pores
27. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
endosymbiont hypothesis
homologs
nucleosome
cristae
28. Cells that lack a membrane-bound nucleus and membrane-bound organelles
enzymes
centromere
prokaryotes
transduction
29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
post-transcriptional processing
centrioles
prophase
interphase
30. Classification of plant whose life cycle survives two seasons
biennial
mutation
anaphase
centromere
31. 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
ribosomes
chromatids
cytokinesis
32. A cell having two sets of chromosomes or twice the haploid number
nucleolus
diploid
cytokinesis
centrioles
33. The organ that bears the ovules of a flower - base of the pistil
ovary
haploid
reduction
microvilli
34. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
stroma
interphase
krebs cycle
microfilaments
35. The stalk of a stamen that supports the anther
filament
nucleosome
endoplasmic reticulum
grana
36. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
microfilaments
telophase
gene
stroma
37. The process of transfering genetic material from one cell to another
transduction
facilitated diffusion
electron microscope
biennial
38. Area where the chromatids of a chromosome are attached
cell wall
inhibitor
nucleolus
centromere
39. Projections on cell membrane increase surface area
microvilli
cell cycle
shoot apex
transcription
40. Cell division which produces two identical cells
centrioles
mitosis
transformation
microvilli
41. Sequence of DNA that codes for a protein and thus determines a trait
electron transport
gene
prosthetic group
microtubules
42. The part of an enzyme where the chemical reaction occurs
ovary
active site
telophase
biennial
43. Plants that grow year after year
gymnosperms
photolysis
perennial
ovules
44. The first stage of mitosis - forming spindle fibres attached to the centromere
secretory vesicles
prophase
pedicel
alleles
45. Classication of plant which produce seeds which are 'naked' (in cones)
endocytic vesicles
pedicel
transformation
gymnosperms
46. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
perennial
fermentation
grana
diploid
47. Sticky portion at the top of the style which traps pollen
stigma
angiosperms
cell membrane
prophase
48. Composed of a bilayer of lipids embedded with globular proteins
vacuole
crossing over
chlorophyll
cell membrane
49. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
cell
metabolism
photolysis
organism
50. The substance acted upon by an enzyme
catabolism
stroma
gymnosperms
substrate