Biology

ResourcesQuestionsBiology

about bacteria

What are halophile, thermoacidophile and methanogen archaebacteria?

Emma

Alleles and Genes

I understand that an allele is the alternate version of the same gene but do two of the same alleles make up a gene? Do genes contain two alleles each?

Emma

analysis of plasmid

how to find out plasmid size

Emma

As Unit 2 ccea exam... HELP!!!!!!! :(

I am struggling with this unit.. i dont no wher to start my revision, i dont have a clue! im also repeating module 1 because i was 3 marks off an A.. and i want to do dentistry so I need top marks!! Can someone please give me notes or something, cause all i have as notes is the revision guide and a huge textbook šŸ™ and my exams are in three weeks!!

Emma

Biology

A researcher is given the task of designing a protein that will bind to a receptor very well. The receptor's binding site has strong positive charges at the edges and negative charges in the center. How would you go about designing the protein to bind to it?

Emma

Biology Year 10 (genetics)?

It shows a family tree. The genotypes of the grandparents regarding a recessive genetic mutation (a) that causes a genetic disorder are given. I can't draw it, so I'll describe it. The first grandma is AA and grandpa is Aa. They gave birth to the father. The second grandma is Aa and the grandpa is Aa too. They gave birthe to the mother. The mother and father then gave birth to the child... QUESTION: What percent chance does the child have of inheriting the disorder? Of being a carrier? Of not carrying the mutation at all? Show your work. QUESTION 2: You discover that those with the disorder rarely live beyond 5 years. How does this change the percentages? Show your work. It's one of the homework questions for test revision and I can't do it!

Emma

cells

movement in and out in the celll

Emma

cells

Which organelle modifies cell products, packages them for distribution, and then may turn into vesicles and bubble off the surface of the cell?

Emma

CITES - international trade on wildlife

In my up coming exams one question is about CITES. I wa sjust puyting this out there to see if anyone could tell me, (1) whether it is working (pros)? (2) the implications/ how it is failing? (3) people's opinions or any good research articles/journals Thanks in advance

Emma

Conditions for life on earth

(This is for AS environmental studies) could I have reasons for how these factors are important for life on Earth. Thanks.

-distance from sun -tilted axis -mass of the planet -magnetic field -day length

Emma

crossing the membrane

A-level bio Q. How does ions cross the phospholipid bilayer? can very small ions just diffuse across?

Emma

Define photosynthesis

Define photosynthesis

Emma

Describe the path that water takes as it enters and exits a maple tree?

Describe the path that water takes as it enters and exits a maple tree?

Emma

describe the path that water takes as it enters and exits a maple tree

describe the path that water takes as it enters and exits a maple tree

Emma

distribution of invertabrates in a habitat

does the distribution of invertabrates in a habitat depnd on the light intensity?

Emma

Distribution of inverts in a habitat

I conducted a study and am comparing the results of two sites where I put pitfall traps. One was a sheltered, upturned soil area (here more species were found - a wide range) and one was an open grassy area with not much shelter. Can someone explain different factors that may affect this other than light intensity? ANY HELP APRECIATED!!

Emma

Diverticulitis

Does anyone know what diverticulitis is?

Emma

DNA and Protein Synthesis

How does DNA control the synthesis of proteins?

Emma

do a leaflet about 1 group of vertebrates

do a leaflet about 1 group of vertebrates

Emma

Do we need to know about effect of cyanide on respiration for AQA A level Biology?

I'm doing past exam questions and quite a lot of old exam questions ask about the effect of cyanide on respiration - is this on the new AQA specification??

Emma

do you agree with animal testing? why?

do you agree with animal testing? why?

Emma

edexcel biology iAl

how are we supposed to study for the biology paper unit 3, report questions

Emma

Egg and Sperm Donation?

  1. Key Points and Differences with egg and sperm donation.
  2. Research egg and sperm donation for use in IVF.

Thanks!

Emma

Enzyme

Explain how pH ,temperature ,enzyme concentration and substrate concentration affect the rate of enzyme action.

Explain the effect of competive and non competitive inhibitors on the rate of enzyme controlled reaction . make reference to reversiable and non reversiable inhibitors.

Emma

enzymes

i want to know about enzymes ,every thing about enzymes ,washing powder.

Emma

Essay question about mitochindria, rough endoplasmic reticulum and lysosomes

Animal cells, including those of humans, are eukaryotic cells. Explain the link between mitochondria in muscle cells and rough endoplasmic reticulum in enzyme secreting cells from salivary glands. The cells in tadpole tails are specialised and contain many more lysosomes compared to its other cells. Describe he production of lysosomes and suggest how this adaptation allows a tadople's tail to be absorbed as it changes into a frog. Animals tend to be multicellular organisms. Give the levels of organisation responsible for creating organisms.

Emma

Exam prep/dissertation

I am studying animal/wildlife conservation. I have to come up with a title or idea for a project where I can do some of my own research in the UK and compare with similar research. Could anyone help me out and point me in a certain direction, I have absolutely no idea what area to focus on or what project to do! Any help will be appreciated!!!

Emma

explain the mode of inheritance of feather colour in a brown layer

explain the mode of inheritance of feather colour in a brown layer

Emma

Explain why the mode of inheritance of feather colour means that a farmer will

Explain why the mode of inheritance of feather colour means that a farmer will

Emma

food chains

how do you create a food chain?

Emma

Function of ER in salivary amylase

Plssss anyone hellllppp

Emma

GCSE AQA Biology Unit 2

I would like some help with the revision

Emma

Genetic

What is a gene..?

Emma

Heartbeat

can you tell me a bit about how a heart works

Emma

help with human biology

help with human biology

Emma

Homework help please!

I seriously need some help with my science homework! You have to fill in the gaps with the words below. You do not need to use all of the words:

When whole animals and grow they get bigger. This happens because their cells divide by cell . One cell can to make two new ___cells.

Cells of the same kind can make a . Different types of tissues make . Organs can work together in an organ . The heart is an organ made from and nerve . It is part of the ____system.

The lungs are part of the system. The brain is part of the system. Food is broken down in the _________ system.

The words are:

DAUGHTER DIVIDE DIVISION PLANTS REPRODUCE SON BLOOD BREATHING CIRCULATORY DIGESTIVE MUSCLE NERVE NERVOUS ORGANS SYSTEM TISSUE TISSUES.

Thank you so much!!! Cerys

Emma

How do you find out the true value of a set of results in Biolgy

How do you find out the true value of a set of results in Biolgy

Emma

How does homeostasis work?

How does homeostasis work?

Emma

How Does The Concentration of Salt Affect The Percentage Of Water Loss In A Potato

what would the gradient show?

Emma

How is energy contained in atp used in the cell

Really need help asap

Emma

How is evolution related to nutrition?

I need some arguments for and against how the theory of evolution relates to nutrition. If you could help me think of some points that would be great, thanks! šŸ™‚

Emma

How the distribution of invertebrates in a habitat depends on the light intensity?

I need help on this for my ISA..so please any accurate information will be beneficial and can I have the website or books for where you received your knowledge from. Including authors and links. Thank You .:)

Emma

How to give an oral presentation?

I’m supposed to do a PowerPoint presentation on Plastic Waste for my Environmental Science course. Besides that, I have already done a research on the same topic. Do you guys know what materials should I memorize? Like should I just memorize the research only?

Emma

how to separate water from flour

how to separate water from flour

Emma

how to zoos intend to use science as well as natural methods to breed pandas

how to zoos intend to use science as well as natural methods to breed pandas

Emma

Hypertonic, hypotonic, isotonic.

How would rinsing your mouth with salt reduce the swelling of gums?

Emma

I hav hw due tomoro please help me!!!!!!!!!!!!!!! I dnt understand it !!!!!!!! Panic

Question: Describe how you would investigate the effect of an enviromental factor on growth of plants that all share the same genetype. Give full practical details that ensur eyou have designed a valid investigation.

Emma

I need help!!!!!!!

I need to do a poster on Sickle Cell Anaemia. What can I do to make it interestin nd lively? Any ideas?

Emma

IGCSE Biology

Any tips for IGCSE Biology that may help me?

Emma

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (

Emma

just a question pls

Explain the characteristics of enzymes and (using named examples), the lock and key theory of enzyme action. Include in your answer, an explanation of the role of enzymes in both catabolic and anabolic reactions.

Emma

leaf modifications

discuss the leaf modifications of poison ivy and squash plants that are designed to prevent organisms from touching or eating their leaves

Emma

Lipids

Why do phospholipids form bi-layers and triglycerides form droplets??

Emma

mapping gene

  1. The genes for ruby eyes (rb), tan body (t) and cut wings (ct) are all found on the X-chromosome of Drosophila melanogaster. All of these are recessive traits. They map in the order rb, ct, t with 12.5 map units between rb and ct and 7.5 map units between ct and t. Suppose you cross a cut wing male with a homozygous female that is both tan and has ruby eyes.
  2. What will the F1 females look like?
  3. Draw map of the section of the X chromosomes that has these 3 genes for the F1 females
  4. Assume you testcross your F1 females.
  5. What progeny classes would you expect? ii. Give approximate numbers for each class based on a total of 2000 progeny.
  6. Assuming the i=1 and there are no double crossovers.
  7. Assuming the i=0 and there are the expected number of double crossovers.

Emma

Mexican Walking Fish

Could I have info about how endangered the Mexican Walking Fish is please šŸ™‚

Emma

Microscope

What is the main limitation of light microscope compared with electron microscope?

Emma

Muscles

why do muscles have to work in pairs?

Emma

Name the amino acid carrier in a cell?

Name the amino acid carrier in a cell?

Emma

OCR UNIT 1 - A Level

Need , tips, practical help in improving my grade ... any tutors willing to help please..

Emma

Osmosis

What is the definition of osmosis

Emma

photosynthesis

What are the raw materials for photosynthesis?

Emma

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