Ask Question, Ask an Expert


Ask Biology Expert

problem 1:

a) What role do microtubules play in intracellular transport?
b) Describe the structure of microfilaments and microfilament networks and describe how they are assembled and disassembled within a cell.
c) Outline two functions that microfilament networks play in cell motility.
d) What function of intermediate filaments have in eukaryotic cells?

problem 2:

a) What two key factors determine the specificity of Watson-Crick base pairing in B-DNA? For each of these factors, describe why this is the case.
b) What activity of E.coli DNA polymerase 1 is responsible for ensuring correct Watso-Crick pairing during DNAS synthesis?
c) Outline briefly how this activity (given in your answer to part (b)) is achieved by this enzyme.

problem 3:
a) What is a mitotic spindle?
b) Which to classes of motor proteins interact with spindle microtubules during mitosis?
c) What role do these motor proteins play in the process of mitosis?
d) A drug that prevents the assembly of microtubules is applied to a culture of dividing cells for four hours. How will the culture treated with the drug differ from an untreated culture of the same cells, in terms of the numbers of cells in different stages of the cell cycle? In your answer, you should describe how the difference in appearance arises.

problem 4:
a) Describe the cellular location and function of the following membrane-bound vesicles: (i) synaptic vesicle, (ii) phagosome.
b) Describe the roles of two of the following proteins associated with the formation of transport vesicles: Epsin, Dynamin, GGA-proteins, GTP-binding adapter proteins.
c) Give one ex of a transport vesicle that moves between the ER and the Golgi apparatus, indicating its coat protein and its direction of movement.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M924321

Have any Question? 

Related Questions in Biology

Answer in one word or sentence1 which plant group is known

Answer in one word or sentence: 1. Which plant group is known as amphibian in the Plant Kingdom? 2. Name the two types of bryophytes. 3. On what basis algae are further classified? 4. Give one word for the following: i. ...

1 250 wordsargue in favor of regulating environmental

#1 250 words Argue in favor of regulating environmental estrogens presenting evidence specifically related to these chemicals and sexual development in the animal kingdom. Can sex determination be the result of errors an ...

Pick a type of cancer to research find articles that answer

Pick a type of cancer to research. Find articles that answer questions concerning your chosen type of cancer. An annotated bibliography consists of two parts: the reference citation in APA format, followed by the summary ...

Case explain the activation and function of b cells in

Case : Explain the activation and function of B cells in body defences. What are the mechanisms of antibody actions which support immunity? How does HIV infection impair the body's ability to produce antibodies? Assignme ...

Discuss the applications of new andor emerging technologies

Discuss the applications of new and/or emerging technologies relating to human biology and their impact upon individuals, human society and/or the environment. 5 pages in all: 1 st page should have the title of your pape ...

Question 1 in drosophila melanogaster eyeless ey is a

Question 1: In Drosophila melanogaster, eyeless (ey) is a recessive trait in which the eyes are tiny or absent. The ey locus is found on chromosome 4. Monosomy and trisomy for this very small chromosome are compatible wi ...

1 nbspnbsp is the fundamental structural andnbsp

1. __________   is the fundamental structural and  __________      unit of all living organisms a. cell, functional b. cell, microscopic c. nucleus, functional d. DNA, microscopic 2. Match the scientists with their respe ...

1 from the figure below what does 55 and 45 of the blood

1. From the figure below, what does 55% and 45% of the blood cells respectively constitute of? 1) RBCs and Plasma, Platelets, Lymphocytes 2) Platelets and Lymphocytes, Plasma, RBCs 3) Plasma and RBCs, Platelets, Lymphocy ...

Part a answer each of the following questions in one or two

Part A: Answer each of the following questions in one or two paragraphs. 1. Create two Punnett squares to display the outcome of the Fl generation and F2 gener¬ation from one of Mendel's experiments with pea plants. Use ...

Assignmentbegin with the information in dna a specific gene

Assignment Begin with the information in DNA, a specific gene. Describe how this genetic information results in the formation of a protein. Define mutation. Explain two specific types. Describe five different methods of ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate