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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. Proteins that act as biological catalysts
anther
secretory vesicles
enzymes
ATP
2. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
substrate
DNA
eukoryotic cells
endoplasmic reticulum
3. Projections on cell membrane increase surface area
microvilli
active site
electron microscope
DNA
4. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
cofactor
biennial
haploid
5. Vacuole membrane
mitochondria
biennial
tonoplast
gametes
6. Matching Chromosomes that are similar but not identical
diploid
stigma
homologs
DNA
7. The organic process whereby the DNA sequence in a gene is copied into mRNA
transcription
electron microscope
meiosis
exocytosis
8. Stalk that supports the flower
filament
reduction
pedicel
endoplasmic reticulum
9. Sequence of DNA that codes for a protein and thus determines a trait
ribosomes
gene
prophase
pistil
10. Body of a chloroplast containing grana
cell cycle
ovary
stroma
anaphase
11. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
microvilli
electron transport
chromatids
angiosperms
12. A substance that retards or stops enzymatic activity
ovules
inhibitor
transformation
prokaryotes
13. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
biennial
mitochondria
substrate
reduction
14. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
active transport
active site
metabolism
transcription
15. Used to examine tiny cell organelles
ribosomes
electron microscope
annuals
genome
16. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
electron microscope
facilitated diffusion
carbon dioxide fixation
golgi apparatus
17. Formed when cell membrane surrounds a molecule outside the cell and ingests it
vascular plants
nuclear pores
endocytic vesicles
alleles
18. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
pistil
microfilaments
cytokinesis
translation
19. Membrane-bound organelle that stores water and soluble substances
electron microscope
vacuole
DNA
eukoryotic cells
20. Small structures in the cytoplasm of a cell that do special jobs
annuals
enzymes
organelles
transformation
21. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
ribosomes
microfilaments
crossing over
post-transcriptional processing
22. Smallest unit of most living things
chlorophyll
cell
transcription
gene
23. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
cell
transcription
glycolysis
24. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
catabolism
virus
genome
reduction
25. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
anaphase
fermentation
endosymbiont hypothesis
enzymes
26. Double-stranded chains of proteins which give structure to the cell
microfilaments
chromatids
chromatin
perennial
27. The substance acted upon by an enzyme
metaphase
ATP
substrate
active site
28. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
mitochondria
substrate
lysosomes
nucleosome
29. Disk-like plates which are the site of photosynthesis in chloroplasts
interphase
genome
centrioles
grana
30. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
photolysis
cristae
virus
31. Consists of DNA tightly coiled around proteins
chromatin
cristae
prophase
crossing over
32. The part of an enzyme where the chemical reaction occurs
anther
post-transcriptional processing
active site
ovules
33. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
perennial
inhibitor
ovary
34. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
cell wall
catabolism
secretory vesicles
crossing over
35. Has a nucleus - has organelles or other cell parts
electron microscope
eukoryotic cells
exocytosis
active site
36. Area where the chromatids of a chromosome are attached
fermentation
alleles
centromere
microfilaments
37. Stores - packages and ships proteins
facilitated diffusion
crossing over
prosthetic group
golgi apparatus
38. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
perennial
codon
nucleosome
prosthetic group
39. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
metabolism
cytokinesis
nucleosome
ribosomes
40. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
homologs
ribosomes
endocytic vesicles
fermentation
41. The part of the stamen that contains pollen
inhibitor
anther
chlorophyll
endocytic vesicles
42. The first stage of mitosis - forming spindle fibres attached to the centromere
prophase
anther
secretory vesicles
cell wall
43. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
codon
translation
glycolysis
transduction
44. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
chromatin
anther
eukoryotic cells
cristae
45. 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)
golgi apparatus
chromatids
electron transport
chromatin
46. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
active site
interphase
pedicel
active transport
47. Green pigment contained in the grana
cytokinesis
homologs
chlorophyll
nucleolus
48. The second phase of mitosis - during which the chromosomes line up across the center of the cell
ATP
anabolism
angiosperms
metaphase
49. Classification of plant whose life cycle survives two seasons
DNA
biennial
cell
lysosomes
50. Cells that lack a membrane-bound nucleus and membrane-bound organelles
cristae
mutation
vascular plants
prokaryotes