Biology 1201A Lecture Notes - Lecture 1: Spindle Apparatus, Sister Chromatids, Nuclear Membrane

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15 Jun 2016

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Interphase: no dividing phase of cell: gap 1 (g1): When dna synthesis and dna replication occurs: gap 2. When some cells enter this loop and do not actually divide therefore they never progress to s phase. Mitosis: nuclear division therefore only the nucleus is dividing. Normally followed by cytokinesis which is cell division. Cell division = dna replication + mitosis + cytokinesis. Replication doubles the dna content of the cell. Mitosis (nuclear division) distributes replicated dna equally into two nuclei. Cytokinesis divides the cytoplasm into distinct daughter cells. Dna replication is necessary as it ensure the daughter cells each receive complete complement of genetic info. Semi conservative replication due to complementary base pairs. Double helix unwinds as hydrogen bonds break. Some overlap with microtubules from opposite spindle poles b. iii. Ring of parallel microfilaments, mixed with myosin is present below the cell membrane a. ii. Sliding of microfilaments constricts the cell furrow is created a. iii.

Related Questions

20. All living things must maintain a constantinternal environment to function properly through the process of__. (Points : 2)

metamorphosis
alkalosis
homeostasis
cryogenesis

Question 21.21. Glucose, fructose, sucrose,starch and glycogen are all examples of ___. (Points : 2)

proteins
carbohydrates
lipids
nucleic acids

Question 22.22. Some insects can "walk onwater" because __. (Points : 2)

water has a high surfacetension
water is adhesive
water istransparent
water expands when itfreezes

Question 23.23. To overcome an energy barrierbetween reactants and products in a chemical reaction, energy mustbe provided to get the reaction started. This energy is called ___energy. (Points : 2)

potential
reaction
initiation
activation

Question 24.24. Where in the cell doesglycolysis takes place? (Points : 2)

lysosomes
cytoplasm
mitochondria
nucleus

Question 25.25. Photosynthesis uses sunlightto convert water and carbon dioxide into __. (Points : 2)

carbon dioxide andwater
oxygen and sugars
proteins and sugars
carbon dioxide andoxygen

Question 26.26. The _____ of photosynthesisare the _____ of cellular respiration. (Points : 2)

electrons, protons
pigments, products
products, reactants
elements, atoms

Question 27.27. The energy currency of thecell is __. (Points : 2)

glucose
ATP
starch
glycogen

Question 28.28. When blood glucose levelsdecrease (as between meals), what reserves are tapped first?(Points : 2)

glycogen
fats
steroids
amino acids

Question 29.29. When glucose is used as anenergy source, the largest amount of ATP is produced by the ____portion of the entire respiratory process. (Points : 2)

glycolytic
Kreb's cycle
acetyl-CoAformation
electron transportchain

Question 30.30. Pyruvic acid can be regardedas the end product of ____. (Points : 2)

glycolysis
fermentation
the Kreb cycle
the electron transportchain

Question 31.31. How can one increase the rateof a chemical reaction? (Points : 2)

Increase the activationenergy.
Cool the reactants.
Decrease the pH.
Add an enzyme(catalyst).

Question 32.32. A prokaryote has ___. (Points: 2)

membrane-boundorganelles
nucleus
mitochondria
a cell membrane

Question 33.33. Unlike animal cells, plantcells have __. (Points : 2)

cell membranes
cell walls
chromosomes
mitochondria

Question 34.34. Which of the followingrequires energy to move molecules across the cell membrane? (Points: 2)

diffusion
osmosis
active transport
passive transport

Question 35.35. The ___ is the site of proteinsynthesis. (Points : 2)

nucleus
ribosome
mitochondrion
cytoskeleton

Question 36.36. Diffusion of water through asemipermeable membrane is called __. (Points : 2)

osmosis
diffusion
active transport
passive transport

Question 37.37. Which component of a cellmembrane is likely to function as a transporter? (Points : 2)

cholesterol
lipids
proteins
carbohydrates

Question 38.38. If potato slice is placed indistilled water, the cells would most likely __. (Points : 2)

lose water and becomelimp
neither take up water orlose water
take up water andswell
transport water into thecell by active transport.

Question 39.39. The chloroplast functions in___. (Points : 2)

protein synthesis
lipid storage
DNA replication
photosynthesis

Question 40.40. The fluid mosaic modelpresents the modern view of ___. (Points : 2)

the cell membranestructure
chromosome movementduring mitosis
protein synthesis
ATP production

Question 41.41. During which stage of mitosisdo nucleoli reappear and the nuclear membrane reforms? (Points :2)

prophase
metaphase
anaphase
telophase

Question 42.42. During which stage of mitosisdo chromatids separate to form two sets of daughter chromosomes?(Points : 2)

prophase
metaphase
anaphase
telophase

Question 43.43. Which of the following is thelongest stage of mitosis? (Points : 2)

prophase
metaphase
anaphase
telophase

Question 44.44. When during the cell cycle isDNA replicated? (Points : 2)

metaphase
Synthesis phase (S)
G1
cytokinesis

Question 45.45. A cell with 10 chromosomesundergoes mitosis and cell division. How many daughter cells areproduced and what number of chromosomes do they have? (Points :2)

4 daughter cells, 20chromosomes each
4 daughter cells, 5chromosomes each
2 daughter cells, 10chromosomes each
2 daughter cells, 5chromosomes each

Question 46.46. Maize (corn) has a haploidnumber of 10. How many chromosomes are in a zygote of maize?(Points : 2)

5
10
20
Not enough informationprovided

Question 47.47. Crossing over is one of themost important events in meiosis because __. (Points : 2)

homologous chromosomesare separated into different daughter cells
the number of chromosomesallotted to each daughter cell must be halved
sister chromatids must beseparated into different daughter cells
it produces new arrays ofalleles on chromosomes and contributes to genetic diversity

Question 48.48. While viewing stained onionroot tip cells you notice that distinct chromosomes cannot beobserved in most of the cells. This is because most of the cells___. (Points : 2)

were killed whilepreparing the slide
are in Interphase
are in metaphase
are undergoingMeiosis

Question 49.49. Each offspring cell producedby binary fission contains __. (Points : 2)

half the chromosomes ofthe original cell
twice as many chromosomesas the original cell
an independent assortmentof the original cell's chromosomes
an identical copy of theoriginal cell's chromosome.

Question 50.50. A DNA strand has the sequenceA-C-A-G-C-C-G-T-A. What would be its complementary strand? (Points: 2)

G-T-G-A-T-T-A-C-G
A-C-A-G-C-C-G-T-A
T-G-T-C-G-G-C-A-T
U-G-U-C-G-G-C-A-U

erinmoose680

Chapter 6: How Cells Harvest Chemical Energy

What is the difference between photosynthesis and cellular respiration?

How do cells capture the energy released by cellular respiration?

What are the products of cellular respiration?

What does pyruvate do?

The conversion of CO2 and H2O into organic compounds using energy from light is called what?

If ATP accumulates in a cell, what happens?

A drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that the drug will be harmful to human cells because the drug inhibits what?

As a result of glycolysis, there is a net gain of ________ ATP(s).

Which of the following is a result of glycolysis?

The enzymes of the citric acid cycle are located in what?

Chapter 7 Photosynthesis: Using Light to Make Food

What is the name given to organisms that can make their own food and thus sustain themselves without consuming organic molecules derived from other organisms?

What is an example of a photoautotroph?

What is the origin of chloroplasts?

In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called what?

The oxygen released into the air as a product of photosynthesis comes from what?

What is the use and production of CO₂ in both photosynthesis and cellular respiration?

Know the parts of the chloroplast. Which structure in the chloroplast represents the thylakoid membrane?

What molecules are reactants of photosynthesis?

What is the source of energy that provides the boost for electrons during photosynthesis?

Why are most plants green?

Chapter 8: The Cellular Basis of Reproduction and Inheritance

What is called the creation of genetically identical offspring by a single parent, without the participation of sperm and egg?

How do eukaryotic chromosomes differ from prokaryotic chromosomes?

Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures are called what?

Eukaryotic cells spend most of their cell cycle in which phase?

What occurs during interphase?

What is the process called by which the cytoplasm of a eukaryotic cell divides to produce two cells?

What is the phase of mitosis during which the mitotic spindle begins to form?

During which phase of mitosis does the nuclear envelope re-form?

What feature of plant cell division distinguishes it from animal cell division?

What features likely accounts for the difference between plant and animal cell cytokinesis?

What must occur for a plant or animal to grow and develop normally?

Chapter 9: Patterns of Inheritance

Most genetic disorders of humans are caused by what type of alleles?

What is the difference between genotypes and phenotypes?

What are the individual features of all organisms?

What does the chromosome theory of inheritance state?

What is the normal complement of sex chromosomes in a human male?

The sex chromosome complement of a normal human female is what?

How many sex chromosomes are in a human gamete?

What is the gene located on a sex chromosome called?

Why are sex-linked conditions more common in men than in women?

Chapter 12: DNA Technology and Genomics

How long has Biotechnology been around?

What do restriction enzymes do?

What are "Sticky ends"?

What is the best definition of a genomic library?

What is a nucleic acid probe?

The only cells that can correctly attach sugars to proteins to form glycoprotein products are what?

How does a vaccine work?

What is the preferred name of the technique used to determine if DNA comes from a particular individual?

The polymerase chain reaction relies upon unusual, heat-resistant ________ that were isolated from bacteria living in hot springs.

Gel electrophoresis sorts DNA molecules on the basis of their what?

Biology 1201A Lecture Notes - Lecture 1: Spindle Apparatus, Sister Chromatids, Nuclear Membrane

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