Cell Biology

________ is the process that moves tubulin subunits to the flagellar tip where they assemble onto ...

________ is the process that moves tubulin subunits to the flagellar tip where they assemble onto ...

________ is the process that moves tubulin subunits to the flagellar tip where they assemble onto axonemal microtubules.
 
  Fill in the blank with correct word.

daniellelady   107   N/A

daniellelady

Characteristics of the tumour-suppressor gene RB

Characteristics of the tumour-suppressor gene RB

Describe the characteristics of the tumour-suppressor gene Rb, including:

(i) the function in the cell cycle of the protein it encodes.
(6 marks)
(ii) the specific cancer caused by loss of its function.
(4 marks)
(iii)

Red.orange.   209   N/A

Red.orange.

CCTV cameras in Microbiology Labs.

CCTV cameras in Microbiology Labs.

Do you feel it will be highly beneficial to have CCTV cameras installed in all Microbiology Labs in the COVID-19 times?

As the COVID vaccines are already developed, the research & development carried further in studying and analysing t

prashantakerkar   266   N/A

prashantakerkar

Multiple Slides samples observations on a Microscope device.

Multiple Slides samples observations on a Microscope device.

Is it possible to design & construct a Microscope (optical or Electron) which can take multiple slides samples instead of a single sample slide at a time?.

Possible construction of the Sample Slides target is a circular disc hold

prashantakerkar   154   N/A

prashantakerkar

Cellular energy and performance?

Cellular energy and performance?

Is there any correlation between a cell's energy usage and its best performance? Perhaps it will accomplish cell death better with higher energy levels versus sticking around when sickly? Otherwise live and do its job better with fewer compromis

CarbonRobot   174   N/A

CarbonRobot

What are the functions of a Biomembrane?

What are the functions of a Biomembrane?

My professor told my class that their are a few functions but I was not able to write them down. Can you please help me?

bari21e   2352   1 Reply

bio_man

Antimicrobial compounds

Antimicrobial compounds

For the following antimicrobial compounds, tell why each inhibits the growth of microogranisms, and why each is selectively toxic (why they are relatively non-toxic for the host)

1) penicillin
2) Steptomyocine
3) Azidothymidine

chels194   1665   1 Reply

bio_man

cells and sodium pumps

cells and sodium pumps

What would happen to a cell if you were to suddenly and completely inhibit its Na+/K+-ATPase (sodium-pump)?

mlsmiddie   1543   1 Reply

bio_man

Cite metabolites, other than antibiotics, produced by microorganisms that can inhibit the growth of

Cite metabolites, other than antibiotics, produced by microorganisms that can inhibit the growth of

cite metabolites, other than antibiotics, produced by microorganisms that can inhibit the growth of other microorganisms.

i badly need the answer. thanks, guys! 

kyrbi   1997   1 Reply

bio_man

Whats the melanin pathway & what are the functions of the genes in this pathway?

Whats the melanin pathway & what are the functions of the genes in this pathway?

I am writing this for a lab report.  Here is what I have so far

The three loci involved in the regulatory and biochemical pathways for melanin production in mice are albino (C), brown (B), and slaty (A). Respectively, these three gene

Shamrock   2779   1 Reply

duddy

Which enzyme catalyzes the reaction H2O2 plus 2H+ yields 2H2O ?

Which enzyme catalyzes the reaction H2O2 plus 2H+ yields 2H2O ?

Which enzyme catalyzes the reaction H2O2 plus 2H+ yields 2H2O ?

 a. peroxidase

 b. catalase

 c. superoxide dismutase (SOD)

 d. all of above

 e. none of above

oceansweet   2040   1 Reply

bio_man

micro

micro

True or False... Superoxide radicals are converted to H2O2 by superoxide dismutase in bacteria growing in O2.

oceansweet   1460   1 Reply

bio_man

Which of the following is best to sterilize heat-labile solutions?

Which of the following is best to sterilize heat-labile solutions?

1. Which of the following is best to sterilize heat-labile solutions?

 a. dry heat

 b. autoclave

 c. membrane filtration

 d. pasteurization

 e. none of above

2. Which of the following

oceansweet   5136   1 Reply

bio_man

micro

micro

Which of the following do not cause hospital-acquired (i.e. nosocomial) infections?



 a. Ability of some bacteria to metabolize disinfectants.

 b. Gram-negative bacteria are often resistant to disinfectants.

oceansweet   1320   1 Reply

star

Fuction of histone

Fuction of histone

Histones interact with DNA in order to:?
1. counteract the positively charged phosphates in the DNA backbone and allow it to coil more tightly.
2. protect bacterial chromosomes from chemical mutagens.
3. regulate expression of the DNA

chang190   1375   1 Reply

bio_man

What is a gap junction? (Neurobiology Questions)

What is a gap junction? (Neurobiology Questions)

Hi. I need help with the following questions. Thanks.

1. The vesicle protein which normally binds calcium and triggers exocytosis is:

 

   A. synapsin    
 

   B. synaptophysin    
 

   C. syna

biol245   2035   1 Reply

sarah!

microbio

microbio

1) Name a major product (biochemical) each of the following provides for the cell and list its subsequent use?

Glycolysis       Product: _NAD? ___________             Use:___________
Respr

chels194   1111   1 Reply

bio_man

Cell Division

Cell Division

Can someone explain the 4 divisions of cell in layman's terms my text is horrible! 

Prophase
Metaphase
Anaphase
Telophase



they are not going into the sections of prophase at all, I'm

mom25grls   1090   1 Reply

bio_man

Genetics

Genetics

6. Assume that the height of tobacco plants is controlled by five genes. Two different alleles exist for genes A, B, C, and D, but only one allele for gene E is present in the population. The effect of each genotype on height is listed below. Total h

Babygal   859   1 Reply

karim89

Active Transport Pumps

Active Transport Pumps

Are active transport pumps subject to the same type of competitive inhibition that facilitated transport receptors and enzymes are?

crazzyjazzy   1581   1 Reply

sarah!

Probability

Probability

1. A man whose maternal grandfather had galactosemia (a rare autosomal recessive metabolic disease) married a woman whose sister had galactosemia. The woman is now pregnant with their first child.

b) (1pt) What is the probability that the

Babygal   3037   1 Reply

bio_man

How are calcium ions extruded from a cell?

How are calcium ions extruded from a cell?

Describe how a eukaryotic cell can extrude calcium ions from the cytosol to the extracellular fluid?

This is what I am thinking:

So I know calcium concentration is kept low in the cytosol.

Would the Ca2+ ions just dif

crazzyjazzy   1321   1 Reply

bio_man

Which one of the following molecules would least likely be used during DNA replication?

Which one of the following molecules would least likely be used during DNA replication?

Which one of the following molecules would least likely be used during DNA replication?

 1. dUTP
 2. dGTP
 3. CTP
 4. dTTP
 5. UTP

only one of them is correct

chang190   1047   1 Reply

bio_man

Okazaki fragment

Okazaki fragment

Okazaki fragments:

1. are synthesized by DNA polymerase I.
 2.are synthesized 5' to 3'.
3. are synthesized on both sides of the ori using one parental strand as template, and not needed to    replicate the o

chang190   859   1 Reply

bio_man

Penicillin was considered a "miracle drug" for all of the following reasons except

Penicillin was considered a "miracle drug" for all of the following reasons except

1. Penicillin was considered a "miracle drug" for all of the following reasons except

 a. It is produced by a mold

 b. It does not affect eukaryotic cells

 c. It is active against many gram-positive bacteria

oceansweet   4168   1 Reply

bio_man

more true and false

more true and false

True or False...

1. Rifamycin is not useful in the treatment of mycobacteria that cause tuberculosis because it cannot penetrate infected tissues and abscesses.

2. Chloramphenicol is recommended for treatment of bacterial infect

oceansweet   873   1 Reply

bio_man

nucleic acid synthesizing enzyme

nucleic acid synthesizing enzyme

A DNA-dependent, DNA-synthesizing 
B RNA-dependent, RNA-synthesizing 
C RNA-dependent, DNA-synthesizing 
D DNA-dependent, RNA-synthesizing 

 1.Primase
2. DNA polymerase I
3.DNA polymerase

chang190   887   1 Reply

bio_man

What is DOC agar?

What is DOC agar?

Desoxycholate Agar is considered Selective and Differenctial culture media. Describe the chemical features that make DOC agar:

Selective for Gram Negative Cell survival?

Differential? (2 differences)

mai   2056   1 Reply

bio_man

From where 24 hydrogen in aerobice respiration if the one glucose have just 12 hydrogen from the ...

From where 24 hydrogen in aerobice respiration if the one glucose have just 12 hydrogen from the ...

From where 24 hydrogen in aerobice respiration if the one glucose have just 12 hydrogen from the beging?   

king0079z   731   1 Reply

bio_man

Bacteria

Bacteria

two different strains of a mutant phage infect a single bacterium. one phae is d- and the other e-. some of the progeny are genotype d+e+ and some are d- e-. what genetic phenomenon does this demonstrate?
a.complementation
b.specialized tra

timorito   646   1 Reply

bio_man

Chromosomal Variance

Chromosomal Variance

An individual fly is heterozygous for two gene orders on the members of a pair of homologous chromosomes (where X represnts the centromere) one member is
A B C D E X F G H I J
If one of the products of crossing over between genes C and D is

timorito   703   1 Reply

sarah!

E coli Conjugation

E coli Conjugation

What will the result of conjugation between E. coli strain 1 ( F- : leucine -,histidine -,) and strain 2 (F+ ;leucine +, histidine +)?

a.1 will become F-, leucine +, histidine + ,2 will remain the same
b. 1 will become F+, leucine -,

timorito   857   1 Reply

sarah!

tRNA help

tRNA help

A single base substitution in the anticodon loop of one of the tRNAs for glycine (tRNAgly) can hypothetically generate a mutant tRNA that is able to suppress translational termination by causing insertion of a glycine residue at certain termination c

trixter47   851   1 Reply

bio_man

DNA size

DNA size

An M. xanthus cell is about 1 uM x 3 uM and its circular genome contains 9 x 106 bp.  Cultures of M. xanthus can reach densities if 109 cells/ml (1 ml = 1 cm3).  If you were to take all the DNA molecules from all the cells in 1 ml of such a

trixter47   683   1 Reply

bio_man

Chromosome theory of inheritance

Chromosome theory of inheritance

why are crosses (i.e. the experiments of Mendel) and the microscopic observations of chromosomes during mitosis and meiosis were both needed to deduce the chromosome theory of inheritance

element41skater   2208   1 Reply

bio_man

Genetics

Genetics

HELP Needed, not sure where to start with these questions.

The scarlet gene of the fruit fly Drosophila melanogaster is involved in the mechanism of eye pigmentation. A true-breeding scarlet-eyed female fly was crossed with a true-breedin

Sara   814   1 Reply

bio_man

DNA sequence

DNA sequence

Is it possible to translate RNA in vitro using cell-free preparations obtained from E. coli lysates. Under certain artificial experimental conditions, an initiator methionine codon is not required and translation can initiate with any amino acid.&nbs

trixter47   839   1 Reply

bio_man

microbio please help

microbio please help

Identify types of growth patterns in broth.

Match the following:

1. E. Coli
2. B. subtilis
3. P. aeruginosa

A. Obligate aerobes
B. Microaerophiles
C. Obligate anaerobes
D. Facultative anaerobe

oceansweet   758   1 Reply

bio_man

micro

micro

What is the difference between a simple stain, special stain, and a differential stain and give some examples.

oceansweet   684   1 Reply

star

Alternative splicing

Alternative splicing

Alternative splicing provides a means for a larger __________ without a resulting increase in the __________.

1. genome; proteome
2. number of genes; genome
3. proteome; genome
4. mature transcript; gene
5. number o

chang190   902   1 Reply

bio_man