V Remember the following word and word-combinations:

The prokaryotic cell, unicellular organisms, a vast heterogeneous group, the photosynthesizing cyanobacteria, chemical composition, morphology, shape, nutritional requirements, sources of energy, biofilms, chromosome, chromosomal proteins, organelles, cell walls, the complex polysaccharide peptidoglycan, fission, the cell splits into two cells, cytoplasm, ribosome, flagella, plasmid, capsule, inclusion.

VI Find the sentences with the following word-combinations:

Одноклеточные организмы, химический состав, источники энергии, отличительные характеристики, клеточная стенка.

VII Give the antonyms of the following words:

Small, vast, similar, different, chief

VIII Linking words – but, however

Complete the sentences with and, so or but.

1. She can speak French, ______ she can’t write it.

2. He’s going to work in Spain, _____ he’s learning Spanish.

3. I went into town. I bought some food _____ I went to the library.

4. I haven’t got a car, _____ I’ve got a motorbike.

5. She’s working late last Friday, _____she can’t come to the party.

IX Answer the questions:

1 What is the prokaryotic cell?

2 How are differentiated bacterial species?

3 How the prokaryotic cells multiply?

4 What do cell walls contain?

5 What do mean histones?

13-14 Practical lesson

Rules of reading: The letter combination ch, ph, th, rh in Greek words

Word formation: prefixes in-,un-

Text: Identify the three basic shapes of bacteria

Assignments to do:

I Remember:

1. Letter combination ch, ph, th, rh in Greek words are pronounced as followings: ch [k] chemistry, th [] asthma, ph [f] photo, rh [r]rhizobium

2. Prefixes in-, un- have negative meaning

different – indifferent

pleasant – unpleasant

Expressions of quantity

Countable nouns	Uncountable nouns
A cup A girl A sugar An egg A pound	Water Sugar Milk Music Money

1. Countable nuns can be singular and plural.

This cup is full.

These cups are empty.

2. Uncountable nouns can only be singular.

The water is cold.

The weather was terrible.

Much and many

1. We use much with uncountable nouns in questions and negatives.

How much money have you got?

There isn’t much milk left.

2. We use many with countable nouns in questions and negatives.

How many people were at the party?

I didn’t take many photos on holiday.

Some and any

1. Some is used in positive sentences.

I’d like some sugar.

2. Any is used in questions and negatives.

Is there any sugar in this tea?

We don’t have any washing-up liquid.

3. We use some in questions that are requests or offers.

Can I have some cake?

Would you like some tea?

II Read the words paying attention to prefixes and translate them:

Incorrect, invalid, inability, inorganic, inadequacy, inartificial, inattentive, unaccompanied, insufficient, unconformity.