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DAT BIOLOGY SECTION NEWEST FINAL EXAM COMPLETE QUESTIONS & DETAILED ANSWERS BRAND NEW
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Mitosis and meiosis II are similar, chromosomes (each with two chromatids) line up in a single file line in the metaphase plate of the cell
dna to keep them separated
Okazaki fragments to make one continuous strand.
for replication by breaking the hydrogen bonds
replication fork to relieve tension and stress from unwinding
that adds new nucleotides) to the template strand Which of the following hormones can both constrict blood vessels and also dilate bronchioles?
- CORRECT ANSWER >>> Epinephrine (adrenaline) fight or flight hormone- constricts blood vessels leading to the digestive system, and dilates the bronchioles to help body get more oxygen In an ecological community, leopards and tigers compete for warthogs as a food source. A sudden growth in the leopard population causes a depletion of warthogs. What is this an
indirect competition and occurs when a shared resource like territory, prey, or food is depleted.
cell
Gastrin stimulates parietal cells to release gastric juice, and it stimulates chief cells to release gastric lipase and pepsinogen.
protection of eggs female mate choice control over conditions of reproduction In the process of urine formation within the nephron, which of the following substances are completely reabsorbed from the filtrate back into
glucose in urine is sign of diabetes
linked genes are usually inherited together, which violates the law of independent assortment genes line up independently and alleles separate at random By what mechanism do crassulacean acid metabolism (CAM) plants reduce photorespiration in
day (due to hot environment) and open their stomata at night
DNA transcription requires RNA polymerase. RNA polymerase is an enzyme that synthesizes mRNA from a DNA template
artery- away from heart, carrying deoxygenated blood back to lungs to get more oxygen then go back to lungs via pulmonary veins The pulmonary artery contains the most deoxygenated blood. The pulmonary vein contains the most oxygenated blood.
Atrial natriuretic peptide is the only hormone we should know for the DAT that decreases blood pressure. If actin microfilaments are inhibited from forming, which of the following would be most likely
Microfilaments (actin) work with myosin to perform the cleavage furrow during cell division. Which of the following types of mutations is required for a proto-oncogene to become
(atmospheric nitrogen) to ammonium (NH4+) A researcher extracts DNA from a host cell. Restriction enzymes are used to cut the DNA and convert them into plasmids. The plasmids are taken up by bacteria to allow the analysis of the
collection of the total genomic DNA from a single organism.
B cells produce antibodies as part of what is known as humoral immunity.
directly on infected cells. The stimulation of the parasympathetic (rest and digest) nervous system would result in which
muscles) others: constricts pupils, stimulates salivation, constriction of bronchi, decrease bp and heart rate, secretion of bile, contracts bladder (increase urination)
phase DNA and centrosome replication occurs in the S (synthesis) phase of the cell cycle
If nondisjunction occurs during the first meiotic division of a human oocyte, what are the
layer "attracto- derm" features that people are attracted to cns, pns Two organisms from different species mate, and the offspring of the hybrids have reduced
CoA Beta-oxidation breaks fatty acids into acetyl CoA molecules that can go into the Krebs cycle. Beta-oxidation takes place in the mitochondrial matrix.
Only 10% of the energy stored as biomass is passed on from one trophic level to the next.
hatches inside the mothers body, then birth happens- example is sharks
vasopressin) stored in the posterior pituitary
(produced in the hypothalamus)
(follicle stimulating hormone) Tropic (indirectly target)
A healthy mother who consumes an insufficient diet has four offspring, all of whom produce
Epigenetic mechanisms are affected by development, chemicals or drugs, diet, and aging. epigenetics is inheritable to daughter cells but does not altar the DNA sequence xylem function in plants transports: direction:
minerals roots - > leaves tracheids and vessel elements phloem function in plants transports: direction:
leaves - > roots sieve and companion cells
the cytosol
for hybrid species: half them and add them 18/2= 24/2= 12+9= 21
The DNA backbone is held together with phosphodiester bonds, and the two strands of DNA are held together by hydrogen bonds. Van der waals and covalent are also present
If toxins (like snake venom) irreversibly bind to and inactivate acetylcholine, the post-synaptic cell will fail to depolarize and contract.
A loss-of-function mutation in the gene that produces which of the following would lead to an
"calcitonin tones down calcium levels"
high resistance Which of the following represents an effective test-cross for plant height? Tall (T) is dominant to
test cross is phenotypically dominant vs homozygous recessive
The TCA cycle, the citric acid cycle, and the Krebs cycle are all names for the same cycle. Two CO2 molecules are produced from each acetyl-CoA molecule that enters the citric acid cycle.
(SA node) also called pacemaker- has automaticity meaning it will fire on its own
enter a cell and cross the cell membrane
capillaries Histamine increases blood flow to an area by dilating capillaries. Tissue swelling is increased by histamine.
Which of the following features of mitochondria and chloroplasts best supports the
Which of the following correctly describes the ion channels during this stage of an action
depolarize the cell, K+ channels are closed
packages, and exported Which layer of the epidermis is only present in the palms of the hands and the soles of the feet?
- CORRECT ANSWER >>> Come- dead keratinocytes, outer layer Lets**- only present in palms of hands and soles of feet Grab- water barrier Some- strength and immunity desmosomes and langerhan cells Beers-
amniotic-inner layer closest to growing embryo, provides water cushion
A mother is affected by a genetic disease and the father is a carrier for the condition. If 50% of
if body becomes too acidic, we breathe more to expel excess CO2, bringing blood pH back up to normal If a human cell has 46 chromosomes at the beginning of meiosis, then at the end of meiosis I