Portage Biod 101 Module 4

PORTAGE BIOD 101 MODULE 4 EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) Nitrogenous bases of DNA Answer Adenine Guanine Thymine Cytosine Contain 2 carbon-nitrogen rings, and 4 nitrogen atoms Answer Purines - A and G Contain 1 carbon-nitrogen ring, and 2 nitrogen atoms Answer Pyramidines - T and C Deoxyribose Answer sugar chemically linked to each base in DNA Nucleoside Answer base + deoxyribose Nucleotide Answer base + deoxyribose + phosphate group complementary pairs Answer purine always pairs with pyramidine (T+A), (C+G) Occur when 2 negatively charged atoms share a hydrogen atom Answer Hydrogen bonds # of hydrogen bonds between A and T Answer two # of hydrogen bonds between C and G Answer three sequence Answer specified linear arrangement of nucleotides linked to the polynucleotide chains of DNA. Defines the entire organism end terminating with a phosphate group Answer 5' (five prime) end end terminating with a hydroxyl group Answer 3' (three prime) end antiparallel arrangement Answer one side of the helix runs in the opposite (5'-3') direction of the other (3'-5) Genome Answer entire sequence of paired bases in DNA histone proteins Answer A simple protein bound to DNA, involved in the coiling of chromosomes Chromatin Answer DNA sequences and their associated proteins Chromosomes Answer structures of packaged chromatin complexes Somatic cell Answer All of the body's cells except gametes Number of chromosomes in each somatic cell Answer 46 (23 pairs) Cell cycle Answer Process of parent cell replicating its genetic info and dividing into 2 new daughter cells cytokinesis Answer division of the cytoplasm interphase Answer G1, S, G2 phases. 90% of cycle time. Gap phase 1 Answer First phase, growth phase Messenger RNA (mRNA) Answer transfers genetic info from DNA to ribosomes site of protein synthesis Answer ribosomes