Science set 2
Which of the following is the appropriate threshold value for mammalian neurons ?
-55 mV
In a certain plant , red flowers are dominant over white flowers . A plant heterozygous for red flowers and a plant with white flowers are crossed Which of the following is the expected proportion of phenotypes in the next generation ?
2 red , 2 white
Which of the following is the atomic number that has 12 protons and 12 neotrons
24
If a portion of a strand of DNA bases reads 5 ' AGCTAGCGT 3 ' , what would the sequence of bases on the complementary stand read ?
3 ' TCGATCGCA 5 '
Osteoporosis results from which of the following
A decline in osteoblast activity while osteoblast activity continues at expected levels
Which of the following substances is responsible for donating H + ions to act as a buffer when blood pH rises ?
Carbonic acid
Which of the following is a mass with the ovary that secretes hormones to maintain the uterine lining during pregnancy ?
Corpus luteum
In a phase diagram , which of the following is the term used for a substance held at a temperature and pressure the liquid and gaseous phases of a substance merge together into a single phase ?
Critical point
Which of the following is released by one type of immune cell to directly activate type of immune cell ?
Cytokines
Which of the following is the function of totipotent cell ?
Develops into any kind of cell
The measurement indicated by the line across the centre of the cell is best referred to as which of the following ?
Diameter
Which of the following can lead to a tsunami ?
Earthquakes
Which of the following is the structure through which blood exits the glomerulus ?
Efferent arteriole
separate genomic DNA fragments by size , which of these laboratory methods is most useful ?
Electrophoresis
Which of the following are used to determine a person's DNA sequence ?
Genes
Which of the following statements best supports the hypothesis that viruses can cause cancer ?
Genes that regulate cell division are found in some viruses
Which of the following glands synthesizes antidiuretic hormone ?
Hypothalamus
Which of the following physiological responses is caused by the release of anti diuretic hormones ?
Increase in water reabsorption in the collecting duct
Which of the following reasons explains why it is important for new scientific findings to be published ?
Other scientists can validate or disapprove the findings
Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg ?
Ovulation
Which of the following summarizes a change that takes place as a solid turns into a liquid ?
Particles become less ordered
Which of the following types of cells produce and release antibodies ?
Plasma B cells
Which of the following properties of water explains its solvent abilities for certain substances
Polarity of water molecules
The cytoskeleton of a cell is comprised of which of the following macromolecules ?
Proteins
Which of the following organic molecules contain both an amine and carboxyl group ?
Proteins
Which of the following vessels caries oxygenated blood ?
Pulmonary vein
Which of the following indicates the function of sodium bicarbonate released by the pancreas ?
Sodium bicarbonate neutralizes the acidity of chime
In a phase diagram , which of the following is the term used for a substance held at temperature and pressure where the solid , liquid , and gaseous states of a substance exist simultaneously ?
Triple point
Which of the following microorganisms lack their own metabolic pathways and can reproduce inside a host cell ?
Viruses
In a plant in which fuzzy leaves ( F ) are dominant over smooth leaves ( f ) , which of the following crosses will produce only offspring with smooth leaves ?
ffx ff
Which of the following are specific immune response ( select all that apply ) ?
o T lymphocyte activation and clonal expansion The formation of memory B cells