Test your basic knowledge |

Bio 101: Harvard

Subjects : science, 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. Maintenance of stable conditions within the internal environment (temperature - PH level - ion concentrations - 02 levels - co2 levels - fuel molecules ie glucose)






2. The body's resting rate of energy expenditure






3. 1. If equal - then amino acid residue drifting neutrally 2. If nonsynon higher than sysnon - positive selection causing change in amino acid residue 3. If sysnon higher than nonsynon then purifying selection resisting change in amino acid residue (ly






4. Fine tuning of adaptive mechanisms (adjusts to climate/temperature- sweating begins sooner and is greater in volume)






5. Stable temperatures






6. In annelids ie earthworms - coelomic fluid is swept through by cilia and tubule cells actively reabsorb good molecules and secret others - exits as urine






7. Amplifies deviation frokm set point






8. Fluctuating temperatures






9. Occurs when ingested nutrients enter the blood stream from the GI tract






10. Cells or organisms having two sets of chromosomes






11. 2NAA + NAa/2N is p and 2aa + NAa/2N is q (however similar frequencies can have very different genotype frequencies)






12. Two or more homologous genes found in different species






13. Creates new genes by inserting exons and flanking introns into a different gene sequence - there by introducing a new domain in the gene product






14. Two or more homologous genes found in different species






15. ADH- increase number of water channels - allows more water to leave duct - urine volume decreases






16. Does not change the encoded amino acid. Occurs at highest rate (also synonymous substitution)






17. Too large to diffuse across plasma membrane so they are digested into monoglycerides and fatty acids - diffused through epithelial cells - re-synthesized into triglycerides - packaged into chylomicrons for lymph & blood transport






18. A favored trait that evolves through natural selection (more organisms with that trait survive than those without)






19. Trait with true indicator of ability to survive in local environment ie bull frogs lifespan can be determined by its size which determines how low it's voice is






20. BMI of 30 or greater






21. Fine tuning of adaptive mechanisms (adjusts to climate/temperature- sweating begins sooner and is greater in volume)






22. Any change in the nucleotide sequences of an organism's DNA (deleterious - neutral - beneficial)






23. Cluster of interconnected fenestrated capillaries - supplied by afferent arteriole - drained by efferent arteriole - podocytes form filatration slits






24. Change on scale at or above species - changes in separate gene pools






25. Allele and genotype frequencies






26. In medulla - run parrallel to loops of Henlue and medullary collecting ducts - minimize excessive loss of solutes via diffusion






27. Daily decline of body temp to save energy (bouts of torpor last mustiple days in hibernation)






28. Ability to compete for mates






29. Much of variation in size lies in non coding DNA as opposed to functional genes. Also in large populations - slightly deleterious sequences more likely to be purged than in small size (thus more noncoding DNA in large population over small)






30. Like in butterfly - often give organism an survival and mating advantage-- however homozygotes will always exist as children of heterozygotes






31. Rate at which an organism uses energy to power these reactions






32. Change in a single nucleotide in a DnA sequence






33. Proportion of genotype in population






34. Allow extracellular fluid to equilibrate with seawater






35. Insects have these which transport uric acid - postassium ions and sodium ions into tubules - but ercovers water (allows insects to live in dry environments






36. Bicarbonate ions (Co2+H2O= h2Co3= H+ + HCO3-) Co2 removed by lungs - H+ removed by urine






37. Releases fatty acids to diffuse into cells of the body - some used during absorptive phase for energy






38. Self fertilization - homozygous genotypes increase - heterozygous genotypes decrease






39. 1. Both copies retain original function 2. Both copies able to produce original gene product - but expression diverges in different tissues or at different times in development 3. One copy may become psuedogene 4. One copy maintains function and seco






40. One loci






41. Taken up by all body cells - used to synthesize proteins - excess converted into fatty acids and then triglycerides






42. Individuals interacting at a given time and place






43. Number of individuals per unit of area/volume (dynamic - change over time)






44. Prolonged energy source for many tissues - and brain - less protein breakdown required






45. Lack of water --> lack of body water - compromises the circulatory system and regulation of body temperature






46. Occurs when ingested nutrients enter the blood stream from the GI tract






47. Produced in adipose tissue in proportion to fat mass - leptin reduces appetite through hypothalamus (increases BMR). Decrease in leptin decreases BMR - increases appetite






48. Reuglated rise in body temp caused by a rise in the hypothalamic set point for metabloic heat production (fights pathogrens - and increased production of white blood cells)






49. Conversion of chemical bond energy in nutrients into the chemical bond energy in ATP - and use of ATP to do work produces heat as byproduct






50. The differential survival and reproduction of individuals in a population based on variation in their traits







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests