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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. Sticky portion at the top of the style which traps pollen
pedicel
biennial
stigma
perennial
2. Proteins that act as biological catalysts
enzymes
ovules
cell wall
exocytosis
3. Different forms of a gene
stamen
alleles
exocytosis
ATP
4. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
mitochondria
gymnosperms
crossing over
anabolism
5. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
gymnosperms
prosthetic group
organelles
transduction
6. The process of transfering genetic material from one cell to another
transduction
cell membrane
mitosis
genome
7. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
gymnosperms
transduction
facilitated diffusion
ovary
8. Small structures in the cytoplasm of a cell that do special jobs
cytoskeleton
organelles
active transport
reduction
9. The part of the stamen that contains pollen
organelles
anther
vacuole
DNA
10. The regular sequence of growth and division that cells undergo
cell cycle
pistil
centrioles
alleles
11. (adenosine triphosphate) main energy source that cells use for most of their work
secretory vesicles
ATP
stamen
codon
12. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
prophase
genome
angiosperms
13. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
cytoskeleton
vascular plants
stigma
cofactor
14. The female part of a flower composed of ovary and style and stigma and ovules
filament
prokaryotes
secretory vesicles
pistil
15. Stores - packages and ships proteins
ovules
golgi apparatus
cytoskeleton
pedicel
16. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
gymnosperms
inhibitor
electron transport
telophase
17. Projections on cell membrane increase surface area
microvilli
chlorophyll
pedicel
mutation
18. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
meiosis
ribosomes
tonoplast
photolysis
19. A substance that retards or stops enzymatic activity
tonoplast
gametes
annuals
inhibitor
20. Two identical chromosomes that split and contain the same genetic material
chromatids
anther
metaphase
meiosis
21. The complete genetic material contained in an individual
photolysis
cell membrane
nucleosome
genome
22. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
stigma
gametes
ATP
microtubules
23. Sequence of DNA that codes for a protein and thus determines a trait
annuals
nucleosome
haploid
gene
24. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
angiosperms
exocytosis
virus
active transport
25. The first stage of mitosis - forming spindle fibres attached to the centromere
prophase
photolysis
carbon dioxide fixation
active transport
26. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
shoot apex
electron microscope
grana
krebs cycle
27. A cell having two sets of chromosomes or twice the haploid number
electron transport
exocytosis
golgi apparatus
diploid
28. 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)
anaphase
electron transport
gametes
secretory vesicles
29. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
endoplasmic reticulum
haploid
glycolysis
cell cycle
30. Living thing
microvilli
organism
chromatids
prosthetic group
31. The male reproductive organ of a flower consisting of anther - filament - and pollen
metaphase
stamen
photolysis
chromatin
32. Matching Chromosomes that are similar but not identical
grana
tonoplast
homologs
endosymbiont hypothesis
33. The stalk of a stamen that supports the anther
cytoskeleton
filament
reduction
fermentation
34. Smallest unit of most living things
cytoskeleton
stamen
telophase
cell
35. Division of the cytoplasm during cell division - new cell is formed
catabolism
cytokinesis
annuals
grana
36. A substance that must join with the enzyme to enable it to fit the substrate
biennial
anabolism
transcription
cofactor
37. Green pigment contained in the grana
chlorophyll
chromatids
cell cycle
glycolysis
38. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
mitosis
carbon dioxide fixation
grana
centrioles
39. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
post-transcriptional processing
nucleosome
nucleolus
virus
40. Cell division that produces reproductive cells in sexually reproducing organisms
meiosis
golgi apparatus
filament
annuals
41. The second phase of mitosis - during which the chromosomes line up across the center of the cell
stroma
active site
metaphase
organism
42. Production of a chemical compound by a living organism
anther
gametes
biosynthesis
ATP
43. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
filament
microtubules
interphase
ovary
44. Consists of DNA tightly coiled around proteins
chromatin
alleles
crossing over
stroma
45. Classification of plant whose life cycle survives two seasons
substrate
cell cycle
biennial
stamen
46. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
crossing over
catabolism
anaphase
active transport
47. Change in a DNA sequence that affects genetic information
mutation
diploid
photolysis
cofactor
48. Pores which allows materials to move in and out of the cell nucleus
nuclear pores
gene
stigma
pedicel
49. The organ that bears the ovules of a flower - base of the pistil
ovary
gymnosperms
fermentation
chromatin
50. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
anabolism
pistil
virus
nuclear pores
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