Biology Final Review Questions Need Help

Biology question!!!!!!!!help this is review for final........?

4. Mitosis Promoting Factor (MPF) is an enzyme that is only active when bound to cyclin. It is therefore a Cyclin-dependent Kinase.

a. What is the function of MPF?

b. Considering MPFs function, during which phase of mitosis would you expect there to be the greatest amount of MPF?

c. The enzyme complex called Anaphase-Promoting Complex (APC) causes cyclin to be removed from MPF. What does this do to MPF activity?

d. Among other things, MPF activates APC, the enzyme described in part c. What is this kind of feedback called?

Final exam review biology questions:?

I don't need you to answer all of them, but whoever can answer the most will get 10 points. your help is very appreciated (: These questions are from my biology exam review, and i can't seem to find the answers.

1. Mammals that have baleen feed on what type of organisms?

2. In mammals, the amount of water in the body is controlled mainly by which organism?

3. What is an example of a Marsupium ( For this question I think the answer might be Kangroo, I'm not sure, but could you tell me if I'm right, and if not, could you give the right answer?)

4. the similar appearance of armadillos and aardvarks is an example of what evolution?

5. bipedal locomotion consists of walking on how many feet?

6. sensory receptors that are sensitive to chemicals are found in the?

7. which structure sends impulses to the brain that enables it to determine body motion and position?

8. uncontrollable pain and sickness occurs because the body cannot produce enough endorphins whena drug user attempts to stop...?

9. Muscle tone is at its peak at what age?

10. What is a characteristic of infancy?

11. an infectious disease is one that is caused by?

12. if a person has memory b cells against a certain pathogen the person is?

13. Autoimmune diseases results when the immune system ....?

I know that there are a lot of questions, but these are the 13 from the 150 questions on my review packet that i couldn't answer. I would GREATLY appreciate your help. Do your best, answer as many as you know. Thanks again (:

Biology final review questions, DNA and mitosis.?

1) consist of a 5 carbon sugar, a nitrogenous base and a phosphate group
2) DNA: adenine, cytosine, thymine, guanine. Pairs: adenine-thymine; guanine-cytosine;
RNA: adenine, cytosine, uracil, guanine. Pairs: adenine-uracil; guanine-cytosine;
3)1. Interphase
DNA has replicated, but has not formed the condensed structure of chromosome. They remain as loosely coiled chromatin.
The nuclear membrane is still intact to protect the DNA molecules from undergoing mutation.
2. Prophase
The DNA molecules progressively shorten and condense by coiling, to form chromosomes. The nuclear membrane and nucleolus are no longer visible.
The spindle apparatus has migrate to opposite poles of the cell..
3. Metaphase
The spindle fibres attach themselves to the centromeres of the chromosomes and align the the chromosomes at the equatorial plate.
4. Anaphase
The spindle fibres shorten and the centromere splits, separated sister chromatids are pulled along behind the centromeres.
5. Telophase
The chromosomes reach the poles of their respective spindles. Nuclear envelope reform before the chromosomes uncoil. The spindle fibres disintegrate.
6.Cytokinasis
This is the last stage of mitosis. It is the process of splitting the daughter cells apart. A furrow forms and the cell is pinched in two. Each daughter cell contains the same number and same quality of chromosomes.
(click here for pictures)
http://library.thinkquest.org/C0118084/Gene/Chromosomal_Inheritance/StagesMitosis.htm
5.they attach to the chromosomes and pull them towards the centromeres so the cell can divide
6.two cells are formed, they are diploid and are genetically identical.
7.DNA replication results in two identical double-stranded daughter molecules.

Review for Biology Final Exam?

I would REALLY appreciate any help with these questions. I need to do well on this final, so any help is such a big help. Words can describe how much I appreciate the help. :)


1. Taxonomical categories from most broad to most specific
2. Characteristics of living things
3. Definition of hypothesis and why a hypothesis is needed in scientific method
4. Types of variables in a controlled experiment and why controlled experiments are
necessary
5. Roles of water in living organisms and characteristics of water that support life in
plants and animals
6. Enzyme function
7. Organelles found in cells and their function
8. Structure of the cell membrane
9. Know the equations for both photosynthesis and cellular respiration.
10. Be able to recognize the stages of mitosis.
11. The objective of mitosis and meiosis.
12. Understand Central Dogma and the processes used by the cell to create protein
(phenotype) from DNA (genotype).
13. Definition of transcription.
14. Definition of translation.
15. Know Mendel’s First Law (the law of segregation) and Second Law (the law of
independent assortment).
16. Define speciation and know the conditions that must be met for speciation to
occur
17. Know the two states of a virus and be able to identify the parts of a virus
18. General structure of prokaryotic cells
19. Steps in binary fission and resulting exponential growth of bacterial cells
20. General characteristics of the four Kingdoms discussed this semester (protists,
plants, fungi, animals)
21. Be able to identify negative and positive feedback systems
22. Define homeostasis
23. What are the four different tissue types in vertebrates
24. Biotic and abiotic factors that limit where an organism can live
25. Be able to identify the trophic levels of a population
26. Calculate r (intrinsic rate of increase) in a population
27. Identify the phases of the logistic growth curve
28. Identify a K-select species vs. r-select species
29. Types of symbiosis