BIOLOGY 1M03 Lecture Notes - Lecture 11: Sister Chromatids, Spindle Apparatus, Microtubule

53 views4 pages

erinbutterfly634

31 Jan 2018

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Bacterial cell division: ability for a pre-existing cell to give rise to another cell is due to the regulated process of cell division. Synthesis of a new cell membrane and cell wall two halves into identical daughter cells. Binary fission identical daughter cells in prokaryotes, Mitosis: the process of cell division in eukaryotes requires more regulated control as part of a larger cell cycle (vs prokaryotic cell division) Two stages: interphase chromosome is long, thin chromatin fiber. S phase dna synthesis occurs (replication - exact copies of every chromosome are created) G1 & g2 gap growth phases: m phase chromosomes compact, duplicated chromosome separate, mitosis. The length of cell division depends on the type of cell that is dividing. Cells can pause the cell cycle in the g0 phase (somewhere between m and s phase) Pause can be short, long, ranging from days to years. Some cells enter g0 phase permanently (non-dividing cells) Periods of quiescence (undergo no cell division)

Related Questions

1- Most of a cell's life is spend in this phase of the cell cycle:

--------------------

2- The cell cycle is a highly regulated process.

True

False

3- Cells replicate their DNA during ________________ phase.

4- In animal cells, ________________________ is the indentation of the cell's surface that marks cytokinesis, the final splitting of the membrane, in the process of cell division.

cleavage furrow

binary fission

cell plate

sister chromatids

5- Somatic ("body") cells are _______________ (2n). This means there are two copies of each chromosome.

6- During the _______ phase(s) cells perform their everyday functions.

7- When chromosomes are duplicated the two strands are called _______________________________ and they are linked together at a point called the ____________________.

sister strands; kinetochore

sister chromatids; centromere

dual chromatids; centromere

genes; chromatid

8- New somatic âbodyâ cells are formed by this process:

meiosis

binary fission

replication

mitosis

9- The cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells.

10- Cells replicate their DNA during ________________ phase.

pucecat917

Part A:

In prokaryotes and eukaryotes cell reproduction is similar in that it requires some kind of signal to proceed, DNA replication, careful separation of the DNA into two equal portions, and division of the cytoplasm. How is cell reproduction different in prokaryotes and eukaryotes?

Select one:

a. In a eukaryotic organism, the signals for cell division are usually not related to the environment but to the function of the entire organism.

b. Eukaryotic cells constantly divide whenever environmental conditions are adequate and the cells are large enough.

c. The linear chromosomes in prokaryotes are constantly being updated.

d. Prokaryotic cell division requires cytokinesis before mitosis because of their small size.

e. The sexual phase of most prokaryotes (bacteria) is essential to the rapid cell division required for infection.

Part B:

What does the name Cyclin Dependent Kinase stand for?

Select one:

a. A protein important to the cell cycle that is dependent on DNA synthesis.

b. An enzyme that cuts DNA so that chromosomes can segregate.

c. An enzyme that phosphorylates other proteins using ATP only when the protein Cyclin is bound to the enzyme.

d. An enzyme that rolls along microtubules dragging a vesicle.

e. An enzyme that connects chromosomes to the spindle fiber.

Part C:

The Cell Cycle is divided into Mitosis, Cytokinesis, and Interphase. Mitosis can be ordered into the following phases:

Select one:

a. Prophase/Prometaphase/Metaphase/Anaphase/Telophase

b. Anaphase/Prometaphase/Metaphase/Prophase/Telophase

c. Metaphase/Anaphase/Telophase/Prophase/Prometaphase

d. Telophase/Prophase/Prometaphase/Metaphase/Anaphase

e. Anaphase/Telophase/Prophase/Prometaphase/Metaphase

Part D:

The Cell Cycle is divided into Mitosis, Cytokinesis, and Interphase. Interphase can be ordered into the following phases:

Select one:

a. S/G1/G2

b. G2/G1/S

c. G1/S/G2

d. G2/S/G1

e. G1/G2/S

amethystyak657

Question 1: For each of the following terms, select the best definition:

gene, phenotype, chromosome, genotype, allele, genome

2.DNA that provides the instructions for synthesizing various types of small RNA molecules1.The complete set of genetic material in a cellan observable trait (or traits) of an organism

3.DNA that provides instructions for building a proteina variant of a gene

4.DNA of no known function

5.The genetic composition that underlies a trait (or traits)

6.A single molecule of DNA & its associated "helper" molecules

7.The portion of DNA that controls when and where proteins are synthesized

Question 2: Fill in the blank with these terms: dependent variable, independent variable, y-axis, x-axis

Understanding graphs is an important skill in science, since being able to visually depict data is often useful for identifying patterns, and can sometimes be the only tool for easily evaluating whether or not the data supports your hypothesis. When viewing a graph, the______ is plotted on the______, and the______we are measuring is plotted on the_____. For example, in one of the photosynthesis experiments last week, temperature was the______, while the size of the bubble at the end of the experiment was the_____

Question 3: For each of the following terms, select the best definition:

diploid cell, haploid cell, fertilization, zygote, gamete, somatic cell

1. The merging of two gametes

2. Any cell in an organism, except those used for reproduction

3. A cell with only one copy of each gene

4. The process of cell division

5. The cells used for sexual reproduction (generally eggs & sperm)

6. The initial cell of an organism

7. A cell that is capable of differentiating into multiple types of specialized cells

8. A cell with two copies of each gene

BIOLOGY 1M03 Lecture Notes - Lecture 11: Sister Chromatids, Spindle Apparatus, Microtubule

Document Summary

Get access

Related Documents

BIOLOGY 1M03 Lecture 15: Module Notes - Theme 4, Module 4

BIOLOGY 1M03 Lecture Notes - Lecture 13: Cirrhosis, Laboratory Mouse, Zygosity

BIOLOGY 1M03 Lecture Notes - Lecture 8: Tata-Binding Protein, Progenitor Cell, Transcription Factor Ii D

Related Questions