BIOLOGY 1A03 Lecture Notes - Lecture 3: Nuclear Pore, Nuclear Membrane, Messenger Rna

22 views7 pages

blushsea-lion252

21 Oct 2017

School

McMaster University

Department

Biology

Course

BIOLOGY 1A03

Professor

Alastair Tracey Rosa Da Silva

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

doinhumolalala and 39849 others unlocked

BIOLOGY 1A03 Full Course Notes

Verified Note

9 documents

Document Summary

Proteins also server to make up a large part of the structures that are important for moving an individual cell or for moving large cargo or molecules within cells. This is the case when we see the interaction between actin and myosin that slide past each other in contractile bundles. Certain proteins embedded in the cell membrane interact with carbohydrates and are also important for cell to cell signalling. Cytoplasmically situated proteins allow for further amplification of these cell to cell signals, often leading to the appropriate cellular responses. Other important proteins are those involved in defence mechanisms in our bodies. These proteins are made by specialized immune cells and serve the role of antibodies that can destroy disease causing viruses and bacteria. The various proteins in our bodies can have different sizes and shapes. Many of these structural differences relate to their functions. For example, the tata box binding protein, which interacts with.

Related Questions

The vesicles that transport materials from donor membranes to acceptor membranes include:

	1.	COP-II coated vesicles
	2.	COP-III coated vesicles
	3.	COP-I coated vesicles
	4.	Clathrin coated vesicles

2.5 points

QUESTION 11

During skeletal muscle contraction, the roles of ATP include:

	1.	ATP is not required for forming the crossbridges between myosin and actin filaments.
	2.	ATP is utilized as a structural linker to mediate the interaction between myosin and actin filaments
	3.	Hydrolysis of ATP provides energy for myosin head to move along actin filaments and the binding of ATP to myosin head allows the detachment of myosin fromactin filaments.
	4.	ATP binds to actin filaments to drive the power stroke of myosin head.

2.5 points

QUESTION 12

One of the functions of smooth endoplasmic reticulum is

	1.	Synthesizing steroid hormone in the endocrine cells of the gonad and adrenal cortex
	2.	Serves as the starting point of the biosynthetic pathway
	3.	Synthesizing secretory proteins
	4.	Degrading cell debris

2.5 points

QUESTION 13

The function of COP-II coated vesicles is mainly:

	1.	Transporting materials from endosomes to Golgi complex
	2.	Moving materials from the ER to the ERGIC and Golgi complex.
	3.	Transporting materials from Golgi complex back to endoplasmic reticulum.
	4.	Involved in receptor-mediated endocytosis.

2.5 points

QUESTION 14

Which of the following processes is completed in rough endoplasmic reticulum?

	1.	Chaperones help misfolded proteins fold correctly.
	2.	Proteins that target to nucleus are synthesized in rough endoplasmic reticulum.
	3.	O-linked glycosylation occurs in rough endoplasmic reticulum.
	4.	Misfolded proteins are destructed in rough endoplamic reticulum.

2.5 points

QUESTION 15

Kinesin is the motor protein that coorporates with microtubules. It has the following functions:

	1.	It uses GTP as energy source.
	2.	It can hydrolyze ATP and use the energy to drive cargo along microtubules from minus end to plus end.
	3.	It has a globular head that can act as GTPase
	4.	The tail of kinesin is more diverse and binds to cargo

2.5 points

QUESTION 16

For correct segregation and trafficking, lysosomal proteins are tagged in the cis-Golgi with phosphorylated mannose residues, and then the tagged lysosomal enzymes are recruited to clathrin coated vesicles by mannose 6-phosphate receptors.

True

False

2.5 points

QUESTION 17

The process that specialized cells, such macrophages, engulf relatively large particles is:

	1.	Called pinocytosis
	2.	Called phagocytosis
	3.	Mediated by COP-II coated vesicles
	4.	Called autophagy

2.5 points

QUESTION 18

Proteins synthesized on rough endoplasmic reticulum and smooth endoplasmic reticulum are imported co-translationally to their destinations

True

False

2.5 points

QUESTION 19

Treatment of cells with a drug that promotes microtubule disassembly disperses Golgi complex into separate stacks of membrane compartments, suggesting that:

	1.	Golgi complex is made of microtubules.
	2.	Microtubules are important for the organization of Golgi complex.
	3.	Microtubules are transported into Golgi complex
	4.	Golgi complex is composed of tubulin proteins

2.5 points

QUESTION 20

Which of the following is correct about signal sequence of a secretory protein?

	1.	It is an âaddress codesâ for protein trafficking pathways
	2.	It is usually located at the C-terminus.
	3.	It targets the ribosome and the protein that is being synthesized to endoplasmic reticulum.
	4.	It is removed in Golgi complex.

apricotgrasshopper117

QuestionGroup: #51 Innate immune 1

Assigned as

Homework

What is the name of a chemical substance responsible for stimulating an immune response?

Pathogen

Rotomers

Antigen

Antibody

Troll receptor

Unanswered

Submit

QuestionGroup: #52 Innate immune2

Assigned as

Homework

What is the purpose of secondary metabolites produced by normal flora in your body?

To aid T cells in fighting local infection

To kill infected B cells

To help balance electrolytes

To inhibit adhesion, and growth of the certain microbes

Unanswered

Submit

QuestionGroup: #53 Innate immune3

Assigned as

Homework

The lysozyme removes most bacteria in our foods through the saliva in our mouth, how does it do this?

The lysozyme attacks the bacteria through the blood.

The lysozyme are not strong enough to get rid of bacteria.

The lysozyme breaks down the polysaccharide walls of different bacteria.

The lysozyme will tell your body to get rid of the bacteria by vomiting.

Unanswered

Submit

QuestionGroup: #54 Adapt immune 1

Assigned as

Homework

In adaptive immunology, the key component is which of the following?

Antigen trigger the the production of vaccines.

Antibodies will trigger responses in the antigen which will cause an inflamation.

Antigens trigger responses of the antibodies which will recognize the antigen.

Antibodies will be able to recognize other antibodies and destroy them.

Unanswered

Submit

QuestionGroup: #55 Adapt immune2

Assigned as

Homework

An autoimmune induced disorder is...?

When the body's immune system attacks a tissue or organ in the body

When the immune system is not present

When the body attacks the antigens and antibodies of the immune system

When the autonomic nervous system attacks the antigen and antibodies of the immune system

Unanswered

Submit

QuestionGroup: #56 Adapt immune3

Assigned as

Homework

Antibodies are also called immunoglobulins and constitute part of the blood proteins. How do antibodies work?

Agglutination-- they just clump with each other (blocking antigen)

Precipitation-- force insolubility and settled out of solution along with antigens

Complement fixation-- proteins attach to antigen surface (causing cell lysis)

Neutralization-- bind to specific sites to prevent antigen attachment

All of the above

Unanswered

Submit

QuestionGroup: #57 Infectious disease

Assigned as

Homework

The most deadly STD is HIV, but many other viruses can be deadly. Name the most common sexually transmitted infection.

Genital human parisis virus (GHPV)

Herpes Simplex

Human papilloma virus (HPV)

Human pappathe virus tentis (HPVT)

Unanswered

Submit

QuestionGroup: #58 Infectious disease2

Assigned as

Homework

Microbes have developed an array of weapons to be able to go from host to host. These virulent factors are divided into several groups, but one important group is the one produced by bacteria. Name the subgroups within this bacterial group.

Retretoxin and maitotoxin

Retretoxin and butotoxin

Endotoxins and exotoxins

Lipotoxin and exotoxin

Unanswered

Submit

QuestionGroup: #59 Infectious disease3

Assigned as

Homework

Sexually transmitted diseases are very successful at spreading from one person to another. Name one important reason for this fact.

Mucous membranes use B cells only and are resistant to antigens

Mucous membranes in the sex organs differ from those of the skin in that they allow certain pathogens into the body

STDs are transmitted through sex only

STDs are usually caused by viruses

Unanswered

Submit

QuestionGroup: #60 HIV/ AIDS

Assigned as

Homework

HIV has which of the following characteristics?

It has an enzyme called reverse transcriptase which causes the DNA to reverse the nucleotide sequence in messenger RNA.

It is a retrovirus meaning that it reverses the order of protein production in that the virus affects the DNA in the cell to make the protein.

It is an anti-retrovirus meaning that it attacks the DNA causing the development of new HIV particles.

It has a short incubation period which means that the symptoms show up also immediately after infection.

BIOLOGY 1A03 Lecture Notes - Lecture 3: Nuclear Pore, Nuclear Membrane, Messenger Rna

BIOLOGY 1A03 Full Course Notes

Document Summary

Get access

Related Documents

BIOLOGY 1A03 Lecture Notes - Lecture 3: Lysosome, Peroxisome, Glycosylation

BIOLOGY 1A03 Lecture Notes - Lecture 3: Glycosylation, Microtubule, Hydrolysis

BIOLOGY 1A03 Lecture Notes - Lecture 6: Nuclear Pore, Ribbon Diagram, Nuclear Membrane

Related Questions