Showing posts with label Biology. Show all posts
Showing posts with label Biology. Show all posts

Saturday, May 15, 2010

Raw Food vs Cooked Food: The Scoop

Is raw food really healthier than cooked food? Let's look at all angles of the question.

Why do we cook food? Basically, food is cooked to kill germs and bacteria and to make it more palatable.

However, not all food requires cooking. For example, some foods like vegetables or fruits can be eaten raw after merely being washed with water. Indeed, sometimes if those types of food are cooked they will not taste nice.

Cooking food also causes its enzymes to denature. Science has also proven that vitamins and minerals in food which are vital for our growth and health are killed off by intense heat.

However, if we were to eat meat, fish or other such foods raw we would most likely throw up at the horrible taste. We would also end up falling ill as these foods contain high amounts of germs and bacteria when they are raw and uncooked.

Hence, to answer the question: For certain types of food which only need to be rinsed to cleanse the dirt off them, it is definitely better to eat them raw as it this will help to preserve the freshness of the food and sustain the vitamins and minerals contained in the food.

On the other hand, you had better not try eating meat or fish raw unless you want to contract salmonella or food poisoning!

Saturday, April 3, 2010

Eating Paper

We use paper for writing and doodling. But what happens if you eat paper?

In some cases, when people are starving and have no other options, they turn to paper as a source of food and nutrition until they can obtain proper food.

The disgustingness of the idea aside, let's look at the actual nutritional contents of paper.

Paper consists of fibre, which originates from plants and trees. Since we eat food which originate from plants, eating paper should technically be safe, right?

WRONG. Paper comes from plants, but it is unsafe to eat. Let's see why.

1. Ink

There is ink on most paper. Ink contains a high amount of chlorine, which is poisonous to the human body. Eating paper would be like drinking down a cup of ink or chlorine.

2. Lack of other nutrients

The only thing that paper contains is fibre and roughage. Apart from helping you to digest better and get rid of waste more easily, that doesn't help much and definitely won't help you to stay healthy.

So what's the verdict? If you ever lack food, don't try eating paper. It would be better not to eat than to eat things containing poisonous substances.

Friday, April 2, 2010

Carnivorous Plants

All plants make their own food through photosynthesis. But some plants also lure and catch insects for their meals.



Why do these plants need to do so? Normally, carnivorous plants grow in places where the soil quality is poor. It is more difficult for the plants to make sufficient food for itself to survive. Thus, to supplement its meals, the plant eats insects to make up for the loss in nutrition.

Wednesday, July 1, 2009

Cells: An Analogy

This is an analogy of cells using animal cells. You probably may not have heard of some of the organelles.

Body: Earth

System: Continent

Organ: Country

Tissue: State

Cell: City

Cell membrane: City border with guards to monitor people entering and leaving the city

Free Ribosome: Individual shop

Ribosome on Rough Endoplasmic Reticulum (RER): Shop part of a franchise

RER: Franchise Headquarters

Smooth Endoplasmic Reticulum (SER): Recycling Plant

Vesicle pinched from RER: Transport vans for shop products

Vesicle pinched from SER: Transport vans for recycled products

Golgi Apparatus: Factory for processing, refining and modifying imported products

Vesicle fusing with Golgi Apparatus: Transport vans arriving and unloading goods

Vesicle pinching off from Golgi Apparatus: Transport vans with ready-to-go goods

Vesicle fusing with cell membrane: Transport vans unloading goods for export out of city

Cytoplasm: Free land

Nucleus: Government

Chromatins: High post officials

Centriole: Civil servants

Nucleolus: President/Prime Minister

Vacuole: Storage Plant

Mitochondria: Power Plant

If you happen to find that my analogy is incorrect at some parts, please let me know so I can change it. Thanks!

Between Chem and Bio

These are some pics of cells. These diagrams contain the different parts of cells and the less known organelles.