Test your basic knowledge |

PCAT Biology Genetics

Subjects : pcat, biology
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. Pairs of homologues in sexually differentiated species






2. Basic unit of heredity






3. Plasmids that are capable of integration into the bacterial genome






4. Silent allele -usually assigned capital letters






5. The noncoding sequence of DNA that serves as the initial binding site for RNA polymerase






6. Consists of structural genes






7. One way of predicting the genotypes expected form a cross -genotypes are determined by looking at the intersections of the grid -indicates all potential progeny genotypes and the relative frequencies of the different genotypes and phenotypes can be e






8. The parents differ in two traits - as long as the genes are on separate chromosomes and assort independently during meiosis






9. Small RNA found in the ctyoplasm that aids in the translation of mRNA's nucleotide code into a sequence of amino acids -brings amino acids to the ribosomes during protein synthesis






10. Either the failure of homologous chromosomes to separate properly during meiosis I or the failure of sister chromatids to separate properly during meiosis II -zygote might either have 3 copies of that chromosome (trisomy) or just a single copy (monos






11. Include incomplete dominance - and codominance






12. Phage DNA takes control of the bacterium's genetic machinery and manufactures numerous progeny - causing the cell to lyse - releasing new virions - each capable of infecting other bacteria -if initial infection takes place on a bacterial lawn - then






13. Alternative forms of genes when it exists in more than one form






14. Can be altered under certain conditions - altering the corresponding characteristics in the organism






15. DNA language must be translated by mRNA in such a way as to produce the 20 words in the amino acid language






16. New codon may be a stop codon






17. Genes that are located on the X or Y chromosome -in humans - most are located on the X






18. Structural component of ribsomes and is the most abundant of all RNA types -synthesized in the nucleolus






19. Organisms that contain two copies of the same allele






20. TRNA binding site for ribosomes to attach to the growing polypeptide chain (peace out site)






21. Location of genes on DNA






22. Synthesized discontinuously in the 5'->3' direction (since DNA polymerase synthesizes only in that direction) as a series Okazaki fragments






23. Binds to the incoming aminoacyl-tRNA complex (Arriving site)






24. Progeny phenotypes are apparently blends of the parental phenotypes






25. Self replication ensures that its coded sequence will be passed on to successive generations






26. System where the repressor binds to the operator - forming a barrier that prevents RNA polymerase from transcribing the structural genes






27. Carries the complement of a DNA sequence and transports it from the nucleus to the ribosomes -assembled from ribonucleotides that are complementary to the 'sense' strand of the DNA -monocistronic






28. New codon may code for the same amino acid






29. Complex that can't bind to the operator - thus permitting transcription






30. Language of DNA consists of four letters: A -T -C -G -language of proteins consists of 20 'words': 20 amino acids -universal for almost all organism






31. Adenine and guanine






32. Structure formed when many ribosomes simultaneously translate a single mRNA molecule






33. Nucleic acid is replaced by another nucleic acid






34. May occur spontaneously or be induced by environmental factors






35. Individuals being crossed






36. Developed the basic principles of genetics through his experiments with the garden pea






37. Genes on the same chromosome will stay together unless crossing over occurs -crossing over exchanges information between chromosomes and may break the linkage of certain patterns

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


38. New codon may code for a different amino acid






39. Complementary to one of the mRNA codons






40. Brings amino acids to the ribosomes in the correct sequence for polypeptide synthesis -recognizes both the amino acid and the mRNA codon






41. Can often affect the expression of a gene -interaction betwen the enironment and the genotype produces the phenotype






42. Progeny generations






43. Consists of a single circular chromosome located in the nucleoid region of the cell






44. Daughter strand that is continuously synthesized by DNA polymerase in the 5'->3' direction






45. Physical manifestation of the genetic makeup






46. The ribosome advances three nucleotides along the mRNA in the 5' to 3' direction and the uncharged tRNA from the P site is expelled - and the peptidyl-tRNA from the A site moves into the P site and completes the cycle






47. Small circular rings of DNA which contain accessory genes






48. Where protein synthesis occurs






49. May infect other bacteria and introduce new genetic arrangements through recombination with the new host cell's DNA






50. Initiation - elongation - and termination