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. Complementary to one of the mRNA codons






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






3. System where the repressor is inactive until it combines with the corepressor






4. Double stranded DNA molecule unwinds and separates into two single strands






5. True-breeding individuals (which - if self-crossed - produce progeny only with the parental phenotype) with different traits - mated them - and statistically analyzed the inheritance of the traits in the progeny






6. Consists of structural genes






7. 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


8. Composed of two subunits (consisting of proteins and rRNA) - one large and one small - that bind together only during protein synthesis -have 3 binding sites (for mRNA and two tRNA)






9. Progeny generations






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






11. Bacteriophages that replicate by the lytic cycle - killing their host cells






12. Physical manifestation of the genetic makeup






13. Initiation - elongation - and termination






14. Process whereby mRNA codons are translated intoa sequence of amino acids -occurs in cytoplasm and involves tRNA - ribosomes - mRNA - amino acids - enzymes - and other proteins






15. Basic unit of DNA - which is composed of deoxyribose (a sugar) bonded to both a phosphate group and a nitrogenous base -bases: purines and pyrimidines






16. Only one trait is being studied in this particular mating






17. Induce mutations -include cosmic rays - X rays - UV rays - and radioactivity






18. Begins at a unique origin of and proceeds in both directions simultaneously






19. Include incomplete dominance - and codominance






20. Short segments from lagging strand






21. Nitrogen bases are added - deleted - or substituted - thus crating different genes; inappropriate amino acids may be inserted into polypeptide chains - and a mutated protein may be produced






22. Changes in the genetic information of a cell coded in the DNA -if occured in the somatic cells - it can lead to tumors in an individual






23. Silent allele -usually assigned capital letters






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






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






26. May occur spontaneously or be induced by environmental factors






27. Adenine and guanine






28. Nucleic acids are deleted or inserted into the genome sequence (lethal)






29. Regulation of gene expression and enables prokaryotes to control their metabolism






30. Location of genes on DNA






31. Individuals being crossed






32. Deoxyribonucleic acid -contains information coded in the sequence of its base pairs - provding the cell with a blueprint for protein synthesis -regulate all life functions -has the ability to self replicate -basis of heredity -mutable






33. Organisms that contain two copies of the same allele






34. 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






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






36. Recessive genes that are carried on the X chromosome will produce the recessive phenotypes whenever they occur in men because no dominant allele is present to mask them -ex: hemophilia and color blindness






37. 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






38. The sequence of nontranscribable DNA that is the repressor binding site






39. Virus that infcts its host bacterium by attaching to it - boring a hole through the bacterial cell wall - and injecting its DNA while its protein coat remains attached to the cell wall and enters the host in either a lytic cycle or a lysogenic cycle






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






41. The study of how traits are inherited from one generation to the next






42. Base sequence of mRNA is translated as a series of triplets






43. (UAA - UAG - or UGA) terminates polypeptide synthesis






44. On amino acid which has an active site that binds to both the amino acid and its corresponding tRNA - ctalyzing their attachment to form an aminoacyl-tRNA complex






45. Nucleic acid is replaced by another nucleic acid






46. New codon may be a stop codon






47. 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






48. Ribonucleic acid -polynucleotide structurally similar to DNA except that its sugar is ribose -contains uracil instead of thymine -usually single stranded -found in both nucleus and cytoplasm -several types are involved with mRNA - tRNA - and rRNA






49. Formed between the amino acid attached to the tRNA in the A site and the fmet attached to the tRNA in the P site






50. Occurs when fragments of the bacterial chromosome accidentally become packaged into viral progeny produced during a viral infection