aqa as biology paper 2.docx

what term is used to describe the different structures of a glucose and b glucose? [1mark] - correct answer hydroxyl group describe how the result from the colorimeter can identify the fruit juice containing the higher sugar content [1 mark] - correct answer juice b suggest how pna affected the transcription of the section of dna [2 marks] - correct answer tight binding to mrna due to the strand displacement in a dna target describe how the production of messenger rna (mrna) in a eukaryote cell is different from the production of mrna in a prokaryotic cell[2marks] - correct answer eukaryotic transpiration takes place of the nucleus,while prokaryotic transcription takes place in the cytoplasm. describe the role of atp in the process of translation in protein synthesis[2marks] - correct answer the formation of a peptide bond between amino acids requires energy in the form of atp needed for translation is provided by the mitochondria within the cell describe the structure and function of the nucleus[4marks] - correct answer a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. it is separated from the cytoplasm by a nuclear membrane. command center of a eukaryotic cell. the shape is disc shaped the student controlled variablea in the test using benedicts solution. give two variables the student controlled.[2marks] - correct answer 1 sample volume 2 temperature What is a gene? - correct answer segment of DNA that codes for a protein. a sequence of dna nucleotide bases that codes for a polypeptide. ZO-1 question? - correct answer zo1 is located in cell surface membrane. 2 antibody is complementary to zo1 . 3 so binds to the zo1. 4 cells identified with dye linked to antibody DNA replication during interphase. two divisions. separation of homologous chromosomes. separation of sister chromatids. produces 4 haploid cells. - correct answer How many daughter cells are produced at the end of meiosis? what is pre mrna - correct answer pre mrna only produced in eukaryote cell. splicing only occurs in eukaryote cell. what is pna - correct answer pna is complementary to dna,reducing rna polymerase activity. What is tRNA? - correct answer provides amino acid joins to trna. What is a isomer? - correct answer isomer benedicts solution. - correct answer higher absorbance has more sugar benedict solution test. - correct answer solution volume. temperature. what is mass of apple core? - correct answer mass of apple core-30. flesh-150. 14.4-whole apple. answer-12 Biodivesity guppies question? - correct answer directional/natural selection what is the test for strarch? - correct answer starch hydrolysed. maltose is soluble. so reduces water potential. what is microvilli? - correct answer Small projections that increase surfaces area for absorption and diffusion. many mitchondria release atp for active transport illeum question - correct answer 41,0.32(micro surface area.321 cell surface area what is role and properties of water? - correct answer acts as a habitat for organisms,make up cytoplasm,tissue fluid,blood,xylem and ar. partially positive hydrogen partially negative oxygen. so separatw water molecules form hydrogen bonds with each other. How are polymers broken down? - correct answer hydrolysis what are inorganic ions? - correct answer Salts/Minerals Inorganic = do not contain carbon, Ion = charged (+ve/-ve) e.g. Sodium Ions (Na+), Chloride Ions (Cl-) what is kingdom of biology - correct answer animals,plant,bacteria,fungi,protists,multicellular,microorganisms. viruses arent living. all organisms made up of cells. how does a zygote develop into an organism? - correct answer stem cell, undifferentiated