Cell Cycle and Cell Division Questions and Answers

Figure 15 13 Dinoflagellates Dinoflagellates such as Gonyaulax have cellulose plates cellulose plate flagella Dinoflagellates supergroup Chromalveolata are photosynthetic but they have two flagella one is free but the other is located in a transverse groove that encircles the animal The beating of these flagella causes the organism to spin like a top The cell wall when present is frequently divided into closely joined polygo nal plates of cellulose At times there are so many of these organisms in the ocean that they cause a condition called red tide The toxins given off in these red tides cause widespread fish kills and can cause paralysis in humans who eat shellfishes that have fed on the dinoflagellates Heterotrophic Protists The term protozoan refers to single celled eukaryotes and its use is often restricted to heterotrophic orgar isms that ingest food by forming food vacuoles Other vacuoles such as contractile vacuoles that rid the cell of excess water are also typical Usually protozoans have some form of locomotion and as shown in Figure 15 14 some use pseudopodia some move by cilia and some use flagella Plasmodium vivax which causes a common form of malaria is an apicomplexan Apicomplexans have special organelles one is an apicomplast at the base of their flagella and the other contains organic chemicals that assist in penetrating host tissues Plasmodium spends a portion of its life cycle in mosquitoes sexual phase and the other part in human hosts asexual phase During the asexual phase of their life cycle all apicomplexans exist as particulate spores which accounts for why they are also called sporozoans In general how do sporozoans differ from the other protozoans shown in Figure 15 14 Plasmodium spores are the cause of malaria they multiply in and rupture red blood cells

11 Explain in your own words how enzyme feedback inhibition benefits a cell

A retrovirus such as HIV is able to work backwards using to copy its own RNA into DNA in its human host A DNA polymerase III B RNA polymerase I C reverse transcriptase D RuBisCo

is added to start of the unmodified RNA to act as protection preventing information loss A 3 GTP cap B The exon C 5 GTP cap D The poly A tail

Which the following is NOT true regarding ribosomes A they are organelles B synthesize proteins C they attach to tRNA D contain highly folded rRNA

A In this DNA fingerprint the crime scene CS DNA matches which suspect most closely 2 B 1 C CS 1 2 3 3

The term semelparity a best describes an organism who only produces offspring twice during their lifetime b best describes an organism who only produces offspring once in their lifetime c refers to an organism with a Type I survivorship curve d best describes an organism who repeatedly produces offspring over the course of their lifetime

Identify which of the following cells are myeloid and which are lymphod neutrophils NK cells basophils B cells macrophages T cells A myeloid B lymphoi

List the 4 stages of neutrophil extravasation at a site of injury when the neutrophil exits the capillary into the tissue Explain what is happening at each stage For the toolbar press ALT F10 PC or ALT FN F10 Mac

genes are controlled before they converted into RNA in a process called In eukaryotes are A recessive control C pre translational B pre transcriptional control D inducible expression

esolved D By verifying patient eligibility By verifying prescriber ID NPI or DEA number By contacting the prescriber to change to an alternative medication By changing the quantity dispensed

Match the definition case study with the Personality Disorder in the box A pattern of distrust and suspiciousness such that other s motives are interpreted as malevolent A pattern of detachment from social relationships and a restricted range of emotional expression A pattern of social inhibition feelings of inadequacy and hypersensitivity to negative evaluation A pattern of disregard for and violation of the rights of others When Korina was twelve years old she began stealing from local stores Her delinquent behavior continued and became more serious as she entered adulthood She showed no empathy guilt or shame and always tried to manipulate other people with her superficial charm Which personality disorder does Korina display Alondra is extremely inhibited in social situations feels inadequate and is extremely sensitive to criticism from her family and her boss Sergio is a 15 year old male who is currently living at home Sergio rarely socializes and when he is not in school he spends most of his time on his computer Sergio says he has one close real life friend but no one has ever seen this person Sergio has a history of doing poorly in mainstream school He reports being very anxious at school because he doesn t fit in When interviewed Sergio was highly animated and often inappropriate with smiling and laughing He avoided eye contact with the interviewer Alizeth thinks that there are enemy agents walking around campus who are putting thoughts and images into her mind She believes that she then sends these thoughts out to other students and that these other students are secretly

e A zygote undergoes mitotic cell division to produce all of the other cells in the offspring Explain why DNA replication and mitosis result in little to no genetic variation among these cells 2 points

Sexual reproduction is associated with O mitosis melosis O binary fission

3 TAU is an important MAP for binding to actin to help its stabilization True o False

20 p53 can function during the cell cycle to halt cell cycle progression if DNA damaged True or False