Biology Unit 2

What components are found in a animal cell?

What components are found in a plant cell?

What components are found in a bacterial cell?

What components are found in a yeast cell?

What is the role of the cell membrane?

The cytoplasm is where the cells chemical reactions take place

What occurs in the ribosomes?

Respiration occurs in the mitochondria

What is the cell wall made of?

What component of the cell gives it shape and support?

[blank_start]Diffusion[blank_end] is the movement of particles from an area of [blank_start]high[blank_end] concentration to an area of [blank_start]low[blank_end] concentration through a [blank_start]partially[blank_end] permeable membrane. Although the movement is [blank_start]random[blank_end], most diffusion occurs following the concentration [blank_start]gradient[blank_end]. Processes which use diffusion include [blank_start]gaseous[blank_end] exchange,and absorption of nutrients from the [blank_start]small[blank_end] intestine into the blood.

A tissue is a group of similar cells working together

An organ system is different tissues working together to complete a common function

An organ system is different organs working together to complete a common function

What types of tissues can be found in an animal?

[blank_start]Muscular[blank_end] tissue [blank_start]contracts[blank_end] and moves what it is attached to, for example in the [blank_start]digestive[blank_end] system it [blank_start]churns[blank_end] food. [blank_start]Epithelial[blank_end] tissue [blank_start]covers[blank_end] organs on the outside and inside. [blank_start]Glandular[blank_end] tissue secretes [blank_start]enzymes[blank_end] and hormones, for example in the digestive system it secretes [blank_start]hydrochloride[blank_end] acid and [blank_start]protease[blank_end].

Which glands are involved in the digestive system?

Digestion takes place in the stomach and the small intestine

Which of the following are the correct roles for the small and large intestines?

Which of the following are tissues that are found in a leaf?

The plant organs are the stem, root and leaves

The xylem transports water and is made up of dead cells towards the leaves

The phloem transports nutrients and minerals just to the shoots

The word equation for photosynthesis is- Carbon dioxide + water -> glucose + oxygen

Where does photosynthesis occur?

Which of the following are parts of the leaf with the correct role?

The limiting factors for photosynthesis are [blank_start]light[blank_end] intensity, [blank_start]carbon dioxide[blank_end] concentration and [blank_start]temperature[blank_end]. Light + CO2 As these increase, the rate of photosynthesis steadily [blank_start]increases[blank_end] up until a certain point where it [blank_start]plateaus[blank_end] off and the limiting factor [blank_start]changes[blank_end]. Temperature When it is too [blank_start]low[blank_end], enzymes are [blank_start]dormant[blank_end], when it is too [blank_start]hot[blank_end], enzymes are [blank_start]denatured[blank_end].

Growth can be maximised using artificial light and paraffin lamps

How is glucose made in photosynthesis Used?

What are protein molecules made up of?

What are proteins used for?

Biological catalysts decrease rate of chemical reactions without being used up

What makes an enzyme specific for its function?

Which of the following is a key example of how enzymes are used?

The enzyme [blank_start]lipase[blank_end] is produced by the [blank_start]salivary[blank_end] glands, the [blank_start]pancreas[blank_end] and the [blank_start]small[blank_end] intestine. This enzyme catalyses the breakdown of [blank_start]starch[blank_end] into [blank_start]sugars[blank_end] in the [blank_start]mouth[blank_end] and [blank_start]small[blank_end] intestine. [blank_start]Protease[blank_end] enzymes are produced by the [blank_start]stomach[blank_end], the [blank_start]pancreas[blank_end] and the small [blank_start]intestine[blank_end]. These enzymes catalyse the breakdown of [blank_start]proteins[blank_end] into [blank_start]amino[blank_end] acids in the [blank_start]stomach[blank_end] and [blank_start]small[blank_end] intestine. They work best in [blank_start]acidic[blank_end] conditions, hence the stomach also produced [blank_start]hydrochloric acid[blank_end]. [blank_start]Lipase[blank_end] enzymes are produced by the [blank_start]pancreas[blank_end] and the [blank_start]small[blank_end] intestine. These enzymes catalyse the breakdown of [blank_start]lipids[blank_end] into [blank_start]fatty[blank_end] acids and [blank_start]glycerol[blank_end] in the [blank_start]small[blank_end] intestine. These work best in [blank_start]alkaline[blank_end] conditions thus the [blank_start]liver[blank_end] produces [blank_start]bile[blank_end], which is stored in the [blank_start]gall bladder[blank_end], that is then secreted into the [blank_start]smll[blank_end] intestine. This also [blank_start]emulsifies[blank_end] the fats to [blank_start]increase[blank_end] the surface area and [blank_start]increase[blank_end] the rate of digestion.

How are enzymes used in the home?

Biological detergents are more effective at low temperatures then other types of detergents

How are enzymes used in Industry?