BIOB10H3 Lecture Notes - Lecture 2: Gene Expression, Ribosomal Rna, Nucleosome

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3 Feb 2017

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Biology part 2- lecture 2 changing the sequence or the code will change the protein. A t , c g (dna : dna) Eukaryotic cells then g1 which is transcription and translation, period of cell growth from g1 to s phase or g0 g0 is when cells leave. M phase is the first step where one cell divides into 2. Phase s dna will be replicated and proteins are duplicated. G2 which is a period of growth! This is where they get ready to go through m phase. Some cells go through apoptosis which is cell death! The nuclear pore is a protein channel that is regulated and made out of 8 subunits. The 8 molecules make a pore that things can go in and out of, and there is a protein on it that regulates it. The nuclear lamina is made out of intermediate filaments outer lining. Nucleolus is the complex site associated with the formation of ribozomes.

Related Questions

1.A mutation occurs in a cell to cause its SH2 domains to be constantly activated. What is the result of this mutation? a. The cell will become senescent and cease to go through the cell cycle b. The cell will no longer be able to complete mitosis because of compromised spindle fibers c. The cell will experience continuous division. d. The cell will create increased G-Protein receptor density at the cell membrane surface, leading to sensitization to ligands released in the intercellular space. e. Nothing will change.

2. Which of the following catalyzes the transformation of ATP to cAMP? a. Adenylyl cyclase b. Phosphorylase c. Protein Kinase d. Phosphoinositol Phospholipase e. Diacyl glycerol

3.During which phases of the cell cycle does the cell have double the amount of DNA? a. G1 and G2 phase b. S and G1 phase c. G2 and Early M phase d. G2 and Late M phase e. G1 and Late M phase

4. Which of the following is a likely reason for apoptosis to occur in a cell? a. The cell is part of a structure that is being modified during development. b. The cell merges with another cell (ex: a sperm and egg cell. c. An error occurred when the cell's DNA was being replicated. d. The organism is growing quickly. e. a and c

1) A tissue in a mouse contains two types of cells: one that divides rapidly and one that divides more slowly. The most likely difference between these two cell types is that the slow-dividing cell type spends more time in phase

G1, G2, G3, M, or S

2) In meiosis II

a- four genetically identical cells are generated

b- sister chromatids are separated

c- DNA replication occurs

d- crossing over occurs

e- both a and b

3) The four haploid nuclei found at the end of meiosis differ from one another in their exact genetic composition. Some of this difference is the result of?

a- cytokinesis

b- replication of DNA during the S phase

c- separation of sister chromatids at anaphase II

d- spindle formation

e- crossing over during prophase I

4) Which of the following does not occur during mitotic prometaphase?

a- disappearance of the nuclear envelope

b- initial movement of chromosomes towards the equatorial plate

c- adhesion of chromatids at the centromere

d- pairing of homologous chromosomes

e- disappearance of the nuclei

Question 11 options:

A condition characterized by the growth of endometrial cells in areas other than the endometrium is called

Question 12

A standard screening test for cervical cancer is called

Question 13

The period of prenatal development in which the basic parts of the organ systems are formed is the

Question 14 options:

Detection of

Spell check is used by pregnancy test kits to detect the early stages of pregnancy.

Question 15

The actual gene sequence governing the expression of a trait is called a

Spell check , whereas the physical expression of this trait is the PHENOTYPE , which can also be defined as the physical expression of a gene.

Question 16

Down syndrome is a disorder where a person has an chromosome 21.

Question

A picture of all chromosomes taken in metaphase and used for analysis is called a

Question 18

A pregnancy where the fertilized egg implants in an area other than the uterus is called

Question

The basic building blocks of DNA are called

Question 20

Monosomy of the X chromosome characterized by a short stocky neck, underdeveloped secondary sexual characteristics, and infertility is called

syndrome.

Question 21

A deletion of the short arm of chromosome 5 with a typical cry that resembles a meowing cat characterize

Question 22

A serious psychological disorder characterized by the fear of becoming obese is called

Question 23

Diffusion of gases between capillary beds and tissues is called respiration.

Question 24

The destruction of alveoli by irritants such as cigarette smoke and agricultural dust is found in a disorder called

Question 25

Of the three types of skin cancer which are the most likely to metastasize

Question 25 options:

Melanoma

Squamous cell carcinoma

Basal cell carcinoma

All of the above have equal ability to metastasize

Question 26

Cancer of this organ/gland causes the most deaths annually

Question 26 options:

Lung

Breast

Prostate

Bladder

Question 27

The correct order of stages of the cell cycle that a new cell will go through immediately after being produced by mitosis is

Question 27 options:

S, G1, G2, M

G1, G2, M, S

G1, S, G2, M

M, G1, S, G2

Question 28

What is the purpose of DNA replication

Question 28 options:

To copy the information in a gene so that extra protein synthesis can be done

To make an RNA copy of the gene

To provide the cell with extra DNA in case the original gets damaged

To ensure that two cells produced by mitosis have the same genetic information as the parent cell

Question 29

Which of the following is not a function and/or advantage of mitosis

Question 29 options:

It can repair damaged tissue

Growth takes place through mitosis

It can replace old or damaged cells

All of the above are functions and/or advantages

Question 30

Which stage of the cell cycle occurs just after mitosis

Question 30 options:

Prophase

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Question 31 (1.5 points) Question 31 Unsaved

DNA replication is completed by the end of

Question 31 options:

Prophase

S phase

Question 32

Which of the following is NOT true of DNA

Question 32 options:

Generally double stranded

Stores the cell genetic information

Replicated by DNA polymerase

Contains A, C, U, and G

Question 33

These cell may enter G0 of the cell cycle permanently

Question 33 options:

Hepatocytes

Transformed cells

Neurons

Cells in the digestive system

Question 34

When a primary spermatocyte, goes through meiosis, how many mature sperm will be produced

Question 34 options:

Question 35

When a primary oocyte goes through meiosis, how many mature eggs will be produced

Question 35 options:

BIOB10H3 Lecture Notes - Lecture 2: Gene Expression, Ribosomal Rna, Nucleosome

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