Biology Pop Quiz

Nehpets

Since bio is a big course we might aswell have it's own topic. Plus short questions actually come up on the exam!

How it works:
Answer the question above you and THEN ask a question. And so on.. don't skip questions etc

Name the 4 stages of mitosis

analyse this

Isn't their 6 stages?

1.Interphase
2.Prophase
3.Metaphase
4.Anaphase
5.Telophase
6.Cytokinasis

Corruptedmorals

You didn't ask a question!

Define homeostasis and give 2 examples..

analyse this

The maintenance of metabolic equilibrium within an organism by adjusting its physiological processes e.g. blood volume and body temperature.

What is mutation?

dan719

Mistakes (changes in DNA) when replication is taking place. I don't even do biology!;)

Okay Mendels three laws!

analyse this

1. the Law of Dominance
2. the Law of Segregation
3. the Law of Independent Assortment

Is their a specific order?

anyways...role of chlorophyll in photosynthesis?

Nehpets

analyse this wrote:

1. the Law of Dominance
2. the Law of Segregation
3. the Law of Independent Assortment

Is their a specific order?

anyways...role of chlorophyll in photosynthesis?

Green pigment in the chloroplasts. necessary for trapping light energy

What is bile?

btw, looked up two bio books and they say 4 stages of mitosis

analyse this

Nehpets wrote:

Green pigment in the chloroplasts. necessary for trapping light energy

What is bile?

btw, looked up two bio books and they say 4 stages of mitosis

I apologise. I must have it confused with something else:o So what are the four stages?

Bile - bitter greenish alkaline fluid secreted by the liver and stored in gall bladder. discharged during digestion where it aids emulsification and absorption of fats.:D

Nehpets

You got them right, Prophase, Metaphase, Anaphase and Telophase Just the other two (which do happen) don't need to me mentioned.

What does the r stand for in rRNA?

Steve01

Ribosome

What are the end products of the light stage of photosynthesis?

genericgoon

Technically its ribosomal but meh

As for the question the answer is ATP and NADPH i believe(hope)

My question : name the type of reproduction used by bacteria?

Your Man

binary fission.

name the 5 stages of genetic engineering...

Steve01

Isolation, Cutting, Insertion, Transformation, Expression if I'm not mistaken.

What type of neurons are active in the nose?

The guy

Steve01 wrote:

Isolation, Cutting, Insertion, Transformation, Expression if I'm not mistaken.

What type of neurons are active in the nose?

Olfactory Neurons? Or maybe just sensory neurons.

What are the cell walls of fungi made of?

elefant

smelly ones

Steve01

Yeah olfactory was right. And fungus cell walls are made of chitin.

What are the differences between a Monocyte and a Lymphocyte?

adam_ccfc

analyse this wrote:

Isn't their 6 stages?

1.Interphase
2.Prophase
3.Metaphase
4.Anaphase
5.Telophase
6.Cytokinasis

No! Mitosis only involves 2-5. It is a nuclear division, not a cell division, and no division takes place whatsoever during Interphase.

Steve01 wrote:

Yeah olfactory was right. And fungus cell walls are made of chitin.

What are the differences between a Monocyte and a Lymphocyte?

Monocytes are phagocytic (i.e they ingest foreign particles) and migratory.
Lymphocytes produce B-Cells (antibodies and memory cells) and T-Cells (killer, helper, suppressor, memory).

Explain the theory of evolution by Natural Selection.

Nehpets

The theory of natural selection states that all species have evolved from pre existing species

what is an endocrine gland?

Steve01

A ductless gland that releases its product into the bloodstream.

Speaking of the endocrine system... Name a hormone and state its function. Also state the consequences of its excess

adam_ccfc

Steve01 wrote:

A ductless gland that releases its product into the bloodstream.

Speaking of the endocrine system... Name a hormone and state its function. Also state the consequences of its excess

Thyroxine, regulates metabolism. Excess: weight loss, anxiety, stress.

What is the function of Human Chorionic Gomadotrophin?

bebop!

Its function is to prevent the disintegration of the corpus luteum of the ovary and thereby maintain progesterone production.

Name the four Root Zones?

unnameduser

zones of protection, cell division, growth and differentiation. When a human muscle cell respires anaerobically, what are the two end products (ignoring the energy produced)

Selphie

Lactic acid and ethanol+carbon dioxide.

What is an immobilised enzyme?

unnameduser

Selphie wrote:

Lactic acid and ethanol+carbon dioxide.

What is an immobilised enzyme?

Lactic Acid and carbon dioxide only. - lactic acid fermentation in mammal muscle deficient in oxygen

Ethanol (and carbon dioxide) is created in Alcohol Fermentation by yeast

ninebeanrows

What is a transgenic organism?

bebop!

Immobilised enzymes are enzymes that are attached, or fixed,to each other or to an inert material.

A transgenic organism contains genes from another species.

Q. State Mendels law of segregation.

Selphie

Mendel's Law Of Segregation states that inherited characteristics are controlled by pairs of factors (alleles) and these factors segregate at gamete formation so that one one factor is carried in each gamete.

State Mendel's Second Law.

TelePaul

I have to say, reading this thread and having done the biology LC paper, you guys are gonna do fine.

shazzyshaz

Selphie wrote:

State Mendel's Second Law.

Law of Independent Assortment. At gamete formation, either of a pair of factors are equally as likely to combine......


Something like that! i'll check me book laters!


-Name the longest and the shortest bone in the body, as well as a bone that is not attatched to any other....- (ok these wont appear but its fun!):)

Corruptedmorals

Longest-femur. Shortest- Hammer (I think). Don't know a bone not attached to any other..

Define respiration, and explain what happens in Krebs Cycle.

shazzyshaz

Corruptedmorals wrote:

Longest-femur. Shortest- Hammer (I think). Don't know a bone not attached to any other..

femur= correst.
shortest= stirrup in ear
and hyoid of the voicebox isnt connected to anyother!! that shud help yis on ''who want to be a billionaire''

adam_ccfc

Corruptedmorals wrote:

Longest-femur. Shortest- Hammer (I think). Don't know a bone not attached to any other..

Define respiration, and explain what happens in Krebs Cycle.

The controlled release of energy from energy-rich chemicals in cells.

Krebs cycle: Acetyl CoA enters the Krebs Cycle in the lumen of the mitochondrion. Here, CO2, electrons, and Hydrogen ions are drawn off. The electrons and hydrogen ions are taken by NAD (as NADH) to the electron transport chain. The CO2 is an end product of respiration, and is either released from the cell, or used for photosynthesis.

Explain the process of Protein Synthesis.

Your Man

DNA uncoils and is transcribed into mRNA
THis mRNA then leaves the nucleus and enters a sub-unit of the ribosome
tRNA enters ribosome and attach to adjacent mRNA and each amino acid binds with mRNA until a stop codon is reached.
New protein is then made

Give a brief account on the mechanism which controls hearbeat..

shazzyshaz

Your Man wrote:

Give a brief account on the mechanism which controls hearbeat..

The sinoatrial node( pacemaker) stimulates the atria to contract, the AV node then contracts and sends a message down the purkinje tissue to the bundle of his which stimulated the ventricle to contract.


I have no idea! is this correct? feel free to change my answer- we;re still in the learning process!! lol

genericgoon

shazzyshaz wrote:

The sinoatrial node( pacemaker) stimulates the atria to contract, the AV node then contracts and sends a message down the purkinje tissue to the bundle of his which stimulated the ventricle to contract.


I have no idea! is this correct? feel free to change my answer- we;re still in the learning process!! lol

Its fine though you may want to mention diastole(relaxation) and systole(contraction) at different stages. I believe one year those were compulsory terms for the marking scheme

Selphie

Nobody's left a question, so I'll take the initiative...

What is a quantitative study?

shazzyshaz

Selphie wrote:

Nobody's left a question, so I'll take the initiative...

What is a quantitative study?

aims to see how much of each organism is in a habitat.

what is a qualatative study?

Tula

shazzyshaz wrote:

what is a qualatative study?

aims to see what organisms live in a habitat

Corruptedmorals

What's with the amount of people who don't ask questions? Jeez.

Name 3 differences between monocot and dicot plants.

genericgoon

Well I didnt actually answer the question. I was just supplementing it.

Anyways, Dicots= Seeds have 2 cotyledons(the clues in the name ), Regular circular distribution of vascular bundles in stem ,leaf's have reticulated veins

Monocots= Seeds have 1 cotyledon, parallel leaf veins and random distribution of vascular bundles in stem.

Question: Name 3 plastids.

balzarywex

chloroplasts, chromoplasts, leucoplasts.

list the stages in viral replication, giving examples of viruses which affect plants, animals and humans.

Corruptedmorals

Ehh, stages? In our book, they're just numbered with pictures really.

The virus attaches itself to the host cell, and inserts it's RNA into the cell.
The RNA destroys the bacterial machinery, manipulating it to assemble new viruses.
The viruses burst out of the cell.

Explain the Dixon-Joly theory of Cohesion-Tension.

Diamond007

Transpirational pull results ultimately from the evaporation of water from the surfaces of cells in the interior of the leaves. This evaporation causes the surface of the water to pull back into the pores of the cell wall. Inside the pores, the water forms a concave meniscus. The high surface tension of water pulls the concavity outwards, generating enough force to lift water as high as a hundred meters from ground level to a tree's highest branches. This only works because the vessels transporting the water are very small in diameter, otherwise cavitation will break the water column.

Emmmm what are phytoalexins?

bebop!

Phytoalexins are stress proteins produced by a plant when it is infected by a micro-organism.

These stress proteis can act by damaging the micro-organisms by attacking their cell walls.

They can stimulate the formation of specialised plant cell walls that prevent the spread of micro-organisms

and can stimulate nearby plants cells to respod to the micro organism.



Q. As regards Ecology distinguish between A Qualitative and A Quantitative Study.

Marshy

Qualitative- prescence/abscebce of species

Quantitative- number of a species


Q. 4 benefits of breast feeding?

Selphie

1. Milk contains the ideal balance of nutrients for the baby.
2. Milk supplies antibodies to the baby that prolong the baby's ability to resist infections.
3. Less chance of infection by micro-organisms than if baby is bottle-fed.
4. Helps the mother's body to recover from the effects of pregnancy and birth.

Q: Distinguish between active immunity and passive immunity.

bebop!

Active Immunity
Involves production of a persons own antibodies in response to antigens that enter the body.

Passive Immunity
This is when individuals are given antibodies that were formed by another organism.

I really enjoy this thread !! i no im sad really haha

heres a good one

Q. Name the only organ that is formed from the tissues of two different individuals and name the tissues aswell

Corruptedmorals

What's with the random questions that are..irrelevant!!

Ehh, the body itself? The zygote?? WHAT??

eZe^

bebop! wrote:

Active Immunity
Involves production of a persons own antibodies in response to antigens that enter the body.

Passive Immunity
This is when individuals are given antibodies that were formed by another organism.

I really enjoy this thread !! i no im sad really haha

heres a good one

Q. Name the only organ that is formed from the tissues of two different individuals and name the tissues aswell

Placenta? Not sure on the tissues.


In the rate of photosynthesis experiment how did one prepare the plant? (came up on a couple of pre s)

Nehpets

cut the stem at an angle and left it pointing upwards?

I'm not sure on this so I won't ask another question

eZe^

Nehpets wrote:

cut the stem at an angle and left it pointing upwards?

I'm not sure on this so I won't ask another question

Kinda, you get the marks from a nice examiner id say!, you pinch the steam to ensure that the pathway oxygen isnt blocked!