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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. Consists of DNA tightly coiled around proteins
eukoryotic cells
biennial
chromatin
filament
2. Has a nucleus - has organelles or other cell parts
stroma
cell membrane
eukoryotic cells
stigma
3. Matching Chromosomes that are similar but not identical
centrioles
cytokinesis
homologs
inhibitor
4. The male reproductive organ of a flower consisting of anther - filament - and pollen
stamen
catabolism
inhibitor
stroma
5. Change in a DNA sequence that affects genetic information
mutation
anaphase
codon
carbon dioxide fixation
6. Process by which a cell releases large amounts of material
filament
cytokinesis
biennial
exocytosis
7. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
cristae
enzymes
alleles
8. A cell having only one complete set of chromosomes
organism
anaphase
haploid
angiosperms
9. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
telophase
centrioles
cytokinesis
virus
10. Area where the chromatids of a chromosome are attached
centromere
organism
eukoryotic cells
meiosis
11. Powerhouse of the cell - organelle that is the site of ATP (energy) production
gymnosperms
prosthetic group
crossing over
mitochondria
12. 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
cytoskeleton
biosynthesis
shoot apex
13. The part of the stamen that contains pollen
eukoryotic cells
biennial
anther
microvilli
14. Vacuole membrane
enzymes
gymnosperms
golgi apparatus
tonoplast
15. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
anther
reduction
DNA
cell
16. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
enzymes
ATP
virus
homologs
17. Pores which allows materials to move in and out of the cell nucleus
nuclear pores
carbon dioxide fixation
krebs cycle
active transport
18. Modification of a cell by the incorporation of exogenous DNA
chromatin
cytokinesis
gymnosperms
transformation
19. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
ribosomes
cytokinesis
shoot apex
haploid
20. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
cell wall
microtubules
electron microscope
angiosperms
21. A cell having two sets of chromosomes or twice the haploid number
metaphase
diploid
mitochondria
metabolism
22. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
gene
vacuole
nuclear pores
endosymbiont hypothesis
23. The regular sequence of growth and division that cells undergo
tonoplast
cell wall
cell cycle
glycolysis
24. Cell division which produces two identical cells
biosynthesis
mitosis
virus
prophase
25. Proteins that act as biological catalysts
catabolism
enzymes
meiosis
organism
26. Membrane-bound organelle that stores water and soluble substances
biennial
vacuole
organelles
filament
27. Formed when cell membrane surrounds a molecule outside the cell and ingests it
endocytic vesicles
fermentation
microfilaments
active transport
28. Breakdown of more complex substances into simpler ones with release of energy
prokaryotes
vascular plants
gene
catabolism
29. Sequence of DNA that codes for a protein and thus determines a trait
transduction
ATP
gene
endoplasmic reticulum
30. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
centromere
meiosis
cytoskeleton
nucleosome
31. The organic process whereby the DNA sequence in a gene is copied into mRNA
transcription
endocytic vesicles
ribosomes
electron transport
32. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
lysosomes
biennial
nucleosome
fermentation
33. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
photolysis
mitochondria
interphase
34. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
annuals
fermentation
eukoryotic cells
organelles
35. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
enzymes
prosthetic group
electron microscope
metaphase
36. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
ovary
reduction
crossing over
angiosperms
37. The first stage of mitosis - forming spindle fibres attached to the centromere
interphase
prophase
endosymbiont hypothesis
alleles
38. The organ that bears the ovules of a flower - base of the pistil
crossing over
inhibitor
ovary
anther
39. The substance acted upon by an enzyme
cell wall
electron transport
substrate
crossing over
40. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
homologs
perennial
endosymbiont hypothesis
cristae
41. The complete genetic material contained in an individual
nucleosome
vascular plants
genome
nuclear pores
42. The stalk of a stamen that supports the anther
cofactor
active transport
microvilli
filament
43. Division of the cytoplasm during cell division - new cell is formed
nuclear pores
centrioles
cytokinesis
biennial
44. Small - dense region within most nuclei in which the assembly of RNA proteins begins
telophase
homologs
nucleolus
chromatin
45. Process of building up complex materials (proteins) from simple materials
telophase
anther
anabolism
pedicel
46. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
organism
krebs cycle
vascular plants
47. Sticky portion at the top of the style which traps pollen
stigma
centromere
cristae
transduction
48. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
virus
enzymes
cristae
49. In photosynthesis - this is the splitting of water by light
photolysis
ATP
centromere
anther
50. Stores - packages and ships proteins
post-transcriptional processing
golgi apparatus
eukoryotic cells
cytokinesis