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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 whose life cycle survives two seasons
cell cycle
biennial
transformation
prokaryotes
2. Cell division that produces reproductive cells in sexually reproducing organisms
DNA
meiosis
cofactor
translation
3. Membrane-bound organelle that stores water and soluble substances
vacuole
centromere
cofactor
translation
4. Structure within ovary of plant that contains egg cells
inhibitor
ovules
ATP
homologs
5. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
facilitated diffusion
ovary
inhibitor
6. Breakdown of more complex substances into simpler ones with release of energy
microvilli
catabolism
fermentation
mitochondria
7. A cell having only one complete set of chromosomes
post-transcriptional processing
metaphase
haploid
diploid
8. Have tissues made of cells that transport water and nutrients throughout the plant
lysosomes
cell
vascular plants
fermentation
9. The stalk of a stamen that supports the anther
chromatids
filament
cell cycle
transformation
10. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
nucleosome
cytoskeleton
post-transcriptional processing
homologs
11. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
stigma
filament
glycolysis
12. Sequence of DNA that codes for a protein and thus determines a trait
cell membrane
gene
vascular plants
prokaryotes
13. Small structures in the cytoplasm of a cell that do special jobs
organelles
prokaryotes
transduction
microvilli
14. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
anaphase
pistil
prophase
haploid
15. The regular sequence of growth and division that cells undergo
ovules
nucleosome
microvilli
cell cycle
16. Modification of a cell by the incorporation of exogenous DNA
transformation
active site
biosynthesis
exocytosis
17. Small - dense region within most nuclei in which the assembly of RNA proteins begins
anther
shoot apex
nucleolus
centromere
18. The part of the stamen that contains pollen
anther
nucleosome
alleles
prophase
19. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
active transport
stamen
anaphase
fermentation
20. 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)
eukoryotic cells
gametes
electron transport
anabolism
21. Double-stranded chains of proteins which give structure to the cell
glycolysis
microfilaments
chlorophyll
centrioles
22. Reproductive cells - have only half the number of chromosomes
reduction
prophase
gametes
chlorophyll
23. Process of building up complex materials (proteins) from simple materials
anabolism
gene
chromatin
microtubules
24. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
organism
krebs cycle
facilitated diffusion
cristae
25. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
glycolysis
vacuole
golgi apparatus
26. The male reproductive organ of a flower consisting of anther - filament - and pollen
cell wall
stamen
filament
cytoskeleton
27. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
nuclear pores
ribosomes
interphase
cell
28. The process of transfering genetic material from one cell to another
active site
transduction
anther
cell cycle
29. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
reduction
cell cycle
inhibitor
golgi apparatus
30. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
post-transcriptional processing
centrioles
stamen
interphase
31. A cell having two sets of chromosomes or twice the haploid number
cell cycle
haploid
catabolism
diploid
32. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
endosymbiont hypothesis
virus
meiosis
crossing over
33. The part of an enzyme where the chemical reaction occurs
centromere
annuals
pedicel
active site
34. Stores - packages and ships proteins
golgi apparatus
active site
anaphase
cristae
35. A substance that retards or stops enzymatic activity
exocytosis
cofactor
inhibitor
reduction
36. The complete genetic material contained in an individual
transcription
genome
microvilli
organelles
37. Division of the cytoplasm during cell division - new cell is formed
facilitated diffusion
microtubules
glycolysis
cytokinesis
38. Two identical chromosomes that split and contain the same genetic material
chromatids
angiosperms
krebs cycle
post-transcriptional processing
39. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
diploid
carbon dioxide fixation
haploid
photolysis
40. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
catabolism
angiosperms
vascular plants
telophase
41. Cells that lack a membrane-bound nucleus and membrane-bound organelles
mitochondria
prokaryotes
nucleolus
eukoryotic cells
42. The organic process whereby the DNA sequence in a gene is copied into mRNA
crossing over
transcription
chromatids
lysosomes
43. Formed when cell membrane surrounds a molecule outside the cell and ingests it
facilitated diffusion
endocytic vesicles
exocytosis
cell
44. Composed of a bilayer of lipids embedded with globular proteins
cofactor
reduction
cell membrane
cell
45. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
post-transcriptional processing
exocytosis
microtubules
translation
46. Powerhouse of the cell - organelle that is the site of ATP (energy) production
endocytic vesicles
anaphase
endosymbiont hypothesis
mitochondria
47. Matching Chromosomes that are similar but not identical
homologs
ovary
cell wall
metabolism
48. Smallest unit of most living things
DNA
cell
microfilaments
cell wall
49. Area where the chromatids of a chromosome are attached
cytokinesis
secretory vesicles
centromere
DNA
50. Disk-like plates which are the site of photosynthesis in chloroplasts
biosynthesis
gene
nucleolus
grana