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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. Classification of plant which survives only a single season
annuals
exocytosis
chromatin
glycolysis
2. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
stamen
cell membrane
stroma
nucleosome
3. (adenosine triphosphate) main energy source that cells use for most of their work
ATP
pedicel
microvilli
pistil
4. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
secretory vesicles
chromatin
translation
prophase
5. Consists of DNA tightly coiled around proteins
chromatin
endocytic vesicles
glycolysis
gene
6. 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
cell cycle
genome
chlorophyll
7. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
diploid
interphase
reduction
eukoryotic cells
8. The substance acted upon by an enzyme
stroma
biosynthesis
substrate
DNA
9. Stores - packages and ships proteins
cell wall
golgi apparatus
electron transport
cell membrane
10. Body of a chloroplast containing grana
stroma
endocytic vesicles
gymnosperms
transcription
11. Composed of a bilayer of lipids embedded with globular proteins
nucleolus
microtubules
glycolysis
cell membrane
12. A cell having two sets of chromosomes or twice the haploid number
diploid
annuals
nuclear pores
lysosomes
13. The first stage of mitosis - forming spindle fibres attached to the centromere
endoplasmic reticulum
vascular plants
prophase
transduction
14. The second phase of mitosis - during which the chromosomes line up across the center of the cell
anaphase
lysosomes
pistil
metaphase
15. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
nucleolus
telophase
stamen
gene
16. Matching Chromosomes that are similar but not identical
centromere
homologs
endocytic vesicles
photolysis
17. Change in a DNA sequence that affects genetic information
microvilli
mutation
cofactor
mitosis
18. The part of the stamen that contains pollen
cell cycle
endocytic vesicles
anther
anaphase
19. Plants that grow year after year
nucleosome
centromere
cristae
perennial
20. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
organelles
endosymbiont hypothesis
translation
21. Classication of plant which produce seeds which are 'naked' (in cones)
vacuole
cofactor
pedicel
gymnosperms
22. 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
lysosomes
crossing over
translation
endoplasmic reticulum
23. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
substrate
cell membrane
transcription
24. The stalk of a stamen that supports the anther
endosymbiont hypothesis
cell
vacuole
filament
25. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
prosthetic group
chromatids
microtubules
microvilli
26. Process of building up complex materials (proteins) from simple materials
centrioles
anabolism
stamen
meiosis
27. Two identical chromosomes that split and contain the same genetic material
prokaryotes
organism
nucleolus
chromatids
28. The organ that bears the ovules of a flower - base of the pistil
cofactor
ovary
annuals
cell cycle
29. Sequence of DNA that codes for a protein and thus determines a trait
gametes
mitosis
transduction
gene
30. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
endosymbiont hypothesis
organelles
vascular plants
31. Reproductive cells - have only half the number of chromosomes
gametes
nucleosome
pedicel
cell cycle
32. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
facilitated diffusion
cell wall
transformation
endosymbiont hypothesis
33. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
anaphase
cell cycle
meiosis
transduction
34. The female part of a flower composed of ovary and style and stigma and ovules
substrate
organelles
nuclear pores
pistil
35. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
virus
haploid
annuals
centrioles
36. Living thing
endocytic vesicles
ATP
nucleolus
organism
37. Cell division that produces reproductive cells in sexually reproducing organisms
active transport
annuals
meiosis
inhibitor
38. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
DNA
endoplasmic reticulum
telophase
cytoskeleton
39. Production of a chemical compound by a living organism
ATP
pistil
biosynthesis
vascular plants
40. The process of transfering genetic material from one cell to another
transduction
DNA
codon
homologs
41. A cell having only one complete set of chromosomes
cytokinesis
chromatin
haploid
glycolysis
42. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
crossing over
virus
krebs cycle
centrioles
43. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
fermentation
organelles
shoot apex
interphase
44. Classification of plant whose life cycle survives two seasons
shoot apex
biennial
krebs cycle
cell wall
45. Vacuole membrane
tonoplast
cell
metaphase
metabolism
46. Small structures in the cytoplasm of a cell that do special jobs
mitosis
organelles
cell cycle
exocytosis
47. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
meiosis
post-transcriptional processing
carbon dioxide fixation
prophase
48. Powerhouse of the cell - organelle that is the site of ATP (energy) production
endoplasmic reticulum
microtubules
mitochondria
centrioles
49. Proteins that act as biological catalysts
anther
enzymes
catabolism
mitochondria
50. Used to examine tiny cell organelles
metaphase
electron microscope
eukoryotic cells
substrate