Academicmaterials

A major component of RNA but not of DNA is: A) adenine. B) cytosine. C) guanine. D) thymine. E) uracil. - E) uracil. A next-generation method of DNA sequencing, 454 sequencing, uses pyrosequencing in which the addition of nucleotides is detected by a: A) radioactive signal. B) fluorescently labeled dNTP. C) pulse from a laser. D) flash of light. E) nano-ruler's physical movement of 4.54 nm detected by laser. - D) flash of light. A pyrimidine is joined covalently to the pentose suga...

2,4-Dinitrophenol and oligomycin inhibit mitochondrial oxidative phosphorylation. 2,4- Dinitrophenol is an uncoupling agent; oligomycin blocks the ATP synthesis reaction itself. Therefore, 2,4-dinitrophenol will: A) allow electron transfer in the presence of oligomycin. B) allow oxidative phosphorylation in the presence of oligomycin. C) block electron transfer in the presence of oligomycin. D) diminish O2 consumption in the presence of oligomycin. E) None of the answers is correct. - A) ...

90% of the worlds population growth in the next century is expected to occur in - less developed countries a biological communitys productivity is a measure of - the amount of biomass produced in the community a keystone species is a species whose presence - influences the population size of many other species in its community a tritmouse and a chickadee are living in the same territory and are using some of the same resources. The best way to classify this interaction is - interspecific ...

Actors in the Budget Process - -Interest groups: Groups organize influence and testimony, promote and advocate. -Agencies: Agencies defend the base budget and advocate for increases. -Chief Executive: The Chief Executive formulates a consolidated proposal to send to the legislature. -Legislature: The legislature considers and amends the budget and then enacts it as law. Authority in County Governments - County governments all generally have: • - A governing body called county commission...

1. Some scientists argue that over time Australopithecus africanus slowly acquired traits, and that they eventually 'became' Homo habilis. This transformation was so complete that there were no residual traces of Australopithecus africanus anymore, as all of them had completely evolved into Homo habilis, thus making Australopithecus africanus extinct. 2. An example of this type of speciation today is the Hawaiian archipelago, to which stray organisms traveled across the ocean via ocean cu...

Abydos - One of the most ancient cities of Upper Egypt. According to Egyptian Mythology-the holy city where Osiris was buried, in addition to many other pharaohs Akhenaton - Egyptian pharaoh of the New Kingdom; attempted to establish a one-god religion, replacing the traditional Egyptian pantheon of gods. BCE Amorites - A group of semitic people who overwhelmed the Mesopotamians and founded the Babylonian Empire, 2000 BCE Catal Huyuk - One of first true cities in history, created in the N...

Allopatric populations - closely related species that are geographically separate Aposematic Coloration - warns or danger Batesian Mimicry - Harmless species looks like predator Biotic factors - living portion (animals, plants, decomposers, etc) Bottom-up control - Mineral nutrients, temperature, and light control plants (primary producers)-- Soil nutrient availability can directly enhance vegetative growth, flowering, and fruiting Character Displacement - when natural selection favors tho...

activators - TFs that increase the levels of transcription initiation Adaptive mutations - evolutionary change and adaptation to new environments, stressful conditions darwins birbs AP - activator proteins ARE - AP2 response elements Base analogs (chem induced - 5-bromouracil resembles thymine, except that it has bromine atom in place of methyl on 5' C base excision repair (BER) - repairs damaged base by using AP endonuclease to cleave damage on 5' side and DNA polymerase add new base...

___ can initiate transcription on its own while ___ need - prok, euk exon junction complex - group of proteins that tells nuclear transport receptors that an mRNA is ready for export mRNAs do: - code for proteins noncoding rna examples - rna splicing, gene reg, telomere maintenance etc reasons euk need more to start transcription - need time to unpack dna rna pol 1 - most rna genes rna pol 2 - proteins, miRNA, noncoding RNAs, rna pol 3 - tRNA, 5S rna, small RNAs rRNAs do: - form ribosom...

A - Alanine (1 letter) Activation of enzymes through ligand binding: why would this be useful? - The binding of a ligand to an allosteric site of a multimeric enzyme often induces positive cooperativity, that is the binding of one substrate induces a favorable conformation change and increases the enzyme's likelihood to bind to a second substrate. Ala - Alanine (3 letter) Arg - Arginine (3 letter) Asn - Asparagine (3 letter) Asp - Aspartic Acid (3 letter) Barr body and relation to hete...

apoptosis is facilitated by breakdown of cell components facilitated by apoptotic bodies - false application of different biotechnologies is referred to as what? - genetic engineering binding of which molecules signal for p53 degradation? - ubiquitin cancer incidence rises with age because DNA replication becomes more error prone over time. - false cell checkpoints often monitor DNA integrity or damage - true cyclins are responsible for cell cycle progression by phosphorylating many target...

Endocrine System Bundle 2024 Update with complete solutions

Adrenal cortex - B Function: release glucocorticoids (cortisol) which raise blood glucose levels and stimulate the breakdown of protein; Mineralocorticoids (aldosterone) which influence the kidneys to reabsorb sodium and excrete potassium; Sex hormones that stimulate reproductive organs and bring about sex characteristics; part of adrenal gland Adrenal Cortex (Histological view) - A Function: release glucocorticoids (cortisol) which raise blood glucose levels and stimulate the breakdown o...

2 categories of chemically hormones - Protein Hormones - amino-acids compounds Steroid Hormones - lipid-molecules from cholesterol 2 Lobes Control - Anterior Lobe of the Pituitary Gland is controlled Hormonally Posterior Lobe of the Pituitary Gland is to controlled by Nerve Impulses Addison's Disease - HyPOfunction of the adrenal glands / do not produce enough of the hormones cortisol or aldosterone / weight loss, muscle atrophy, weakness, dark pigmentaion of the skin and gums. increases ...

acromegaly - Hypersecretion of the GH in adults which causes an overgrowth of bones in the hands, feet, and face adrenal gland - one of a pair of ductless glands, located above the kidneys, consisting of a cortex, which produces steroidal hormones, and a medulla, which produces epinephrine and norepinephrine. adrenocorticotropic hormone - A peptide hormone released from the anterior pituitary, it stimulates the production and secretion of steroid hormones by the adrenal cortex. aldosterone...

Acinar cells - -pancreatic cell that produces enzyme-rich juice -it is an exocrine product ACTH (adrenocorticotropic hormone) aka corticotropin - anterior pituitary hormone that influences the activity of the adrenal cortex Adrenal cortex - outer portion of the adrenal gland that produces steroid hormones Adrenal gland - -paired endocrine glands located superior to the kidneys -each consists of an outer cortex & and inner medulla -cortex secretes mineralocorticoids, glucocorticoids & andr...

How are the anabolic properties of insulin used? - Protein synthesis, lipid synthesis/storage, glycogen synthesis In what situations would our need for ADH be reduced? - If we have increased blood volume or consume alcohol (alcohol inhibits ADH production) In what situations would someone need more ADH? - If they are dehydrated, bleeding, or losing fluid in any way (lowers BV and therefore BP) Is cortisol catabolic or anabolic? - catabolic Is insulin a catabolic or anabolic hormone? - Ana...

Anabolic hormones stimulate what? - Anabolism (building up) in target cells. Are hormones regulated by positive or negative feedback? - Negative feed back Are large or small amounts of hormones needed to get desired response? - Small amounts. Hormones are very potent and have long-lasting effects in target cells. Does the Posterior Pituitary release hormones? - No Does the thymus grow? - No. it appears smaller in adults than children because it does not change in size. Hormone action can ...

describe an ADH disorder: - diabetes insidious: a condition of excessive ruin output which causes people to be continually thirsty and rink huge amounts of water; results from hypo secretion of ADH describe gonadotropic disorders: - - hyposecretion of FSH or LH leads to sterility in both males and females but hypersecretion does not appear to cause any probems describe hormonal stimulation of endocrine glands: - endocrine glands are activated by hormones from other glands when levels of the...

ACH - stimulates cells of the adrenal cortex that produce glucocorticoids adrenal glands - one on top of each kidney outer cortex and inner medulla medulla produces epinephrine and nonepinephrine --- fight or flight actions of body adrenal glands - release epinephrine or nonepinephrine help the body respond to stress Antidiuretic Hormone - decrease urine production decrease sweating increase blood pressure blood chemicals - glands respond to changing levels of chemicals in the blood E...