Leaving Cert Biology exam questions game

The Adversary

So, I have an idea for a game that might be a useful resource for the last few valuable weeks of study before the exam. Similar questions (or identical in some cases) are asked continually on the paper and usually they can be quite tricky. So that is where this thread comes in. You answer the question by the poster above and then write out another question from any topic and any year that has appeared in one alteration or another (one that doesn't require too much of a lengthy answer) and the cycle repeats. My vision would be that the night before the exam you could have a read through this thread and hopefully a couple of the questions might crop up. I'll start with an easy one.

"What is the economic importance of viruses?"

emersyn

The Adversary wrote: »

So, I have an idea for a game that might be a useful resource for the last few valuable weeks of study before the exam. Similar questions (or identical in some cases) are asked continually on the paper and usually they can be quite tricky. So that is where this thread comes in. You answer the question by the poster above and then write out another question from any topic and any year that has appeared in one alteration or another (one that doesn't require too much of a lengthy answer) and the cycle repeats. My vision would be that the night before the exam you could have a read through this thread and hopefully a couple of the questions might crop up. I'll start with an easy one.

"What is the economic importance of viruses?"

Viruses can be used in genetic engineering to transfer genes from one organism to another, and they can be used to control bacterial infections.

"Distinguish between contest competition and scramble competition."

Codswapple

Contest- there is one winner one loser eg deer looking for mates
Scramble- they all get a bit of the resource eg sunlight

Human Reproduction: Name the 3 germ layers.

AulBiddy

Codswapple wrote:

Human Reproduction: Name the 3 germ layers.

Ectoderm mesoderm endoderm

What is meant by vegetative propagation?

The Adversary

AulBiddy wrote: »

Ectoderm mesoderm endoderm

What is meant by vegetative propagation?

Vegetative propagation is a form of asexual reproduction of a plant. Only one plant is involved and the offspring is the result of one parent. The new plant is genetically identical to the parent.

"Suggest an advantage of using ATP as an energy store in cells"

dazzadazza

The Adversary wrote: »

Vegetative propagation is a form of asexual reproduction of a plant. Only one plant is involved and the offspring is the result of one parent. The new plant is genetically identical to the parent.

"Suggest an advantage of using ATP as an energy store in cells"

ATP is very high in energy.

How are the products of stage 1 in photosynthesis used in stage 2?

marko747

NADH provides the hydrogen for Glucose made in stage 2

Why would a doctor be reluctant to prescribe antibiotics for someone suffering from cold like symptoms?

emersyn

marko747 wrote: »

NADH provides the hydrogen for Glucose made in stage 2

Why would a doctor be reluctant to prescribe antibiotics for someone suffering from cold like symptoms?

The common cold is a virus - antibiotics do not affect viruses because they have no organelles to destroy or attack.

Distinguish between anabolism and catabolism.

BlueWolf16

anabolism is building-up, catabolism is breaking-down.

distinguish between arteries and veins.

LordKingJimmy

BlueWolf16 wrote: »

distinguish between arteries and veins.

Arteries have thicker walls and do not have valves while Veins have thinner walls and have valves

What is meant by Haploid cell

emersyn

LordKingJimmy wrote: »

Arteries have thicker walls and do not have valves while Veins have thinner walls and have valves

What is meant by Haploid cell

Haploid cells are cells with only one set of chromosomes.

In relation to structures such as the cell membrane, explain the term selective permeability.

LordKingJimmy

emersyn wrote: »

Haploid cells are cells with only one set of chromosomes.

In relation to structures such as the cell membrane, explain the term selective permeability.

They will only allow a few substances to pass through them.

Distinguishing between anaerobic and aerobic respiration

koolis02

aerobic uses oxygen, anaerobic doesn't use oxygen
How does a phospholipid differ from a fat?

royal10march

Fat is made up of three fatty acids with glycerol whereas phospholipids have only two fatty acids and the third is replaced by a phosphate group.

What is meant by the term diploid number?

Peg14

Diploid means 46 chromosomes (2 sets of chromosomes) Also written as 2n

Where is urea formed

Codswapple

The liver.

Name the gas responsible for an increase in breathing rate as a result of an increase in activity levels.

Inspector Coptoor

Codswapple wrote: »

The liver.

Name the gas responsible for an increase in breathing rate as a result of an increase in activity levels.

CO2.
As its concentration in blood plasma increases, more and more carbonic acid is formed, lowering blood pH below homeostatic levels which triggers and increase in breathing rate.

State the precise locations of the mitral and semi lunar valves