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33.Прочитайте текст
STRUCTURE OF THE COMMON АМINO ACIDS
1. The ammo acids present in proteins differ from each other in
the structure of their side (R) chains. The simplest amino acid is
glycine, in which R is a hydrogen atom. In a number of amino
acids, R represents straight or branched carbon chains. One of
these amino acids is alanine, in which R is the methyl group (CH3). Valine, leucine and isoleucine. with longer R groups,
complete the alkyl side-chain series. The alkyl side chains (R
groups) of these amino acids are nonpolar; this means that they
have no affinity for water but some affinity for each other.
Although plants can form all of the alkyl amino acids, animals
can synthesise only alanine and glycine; thus valine, leucine, and
isoleucine must be supplied in the diet.
2. Two amino acids, each containing three carbon atoms, are
derived from alanine; they are serine and cysteine. Serine contains
an alcohol group (-CH2-OH) instead of the methyl group of
alanine, and cysteine contains a mercapto group (-CH2SH).
Animals can synthesise serine but not cysteine or cystine.
3. Cysteine occurs in proteins predominantly in its oxidized form
(oxidation in this sense meaning the removal of hydrogen atoms),
called cystine. Cystine consists of two cysteine molecules linked
by the disulfide bond (-S-S-) that results when a hydrogen atom is
removed from the mercapto group of each of the cysteine.
Disulfide bonds are important in protein structure because they
allow the linkage two different parts of a protein molecule to and thus the formation of loops in - the otherwise straight chains
Some proteins contain small amounts of cysteine with free
sulfhydryl (-SH) groups.
4. Four amino acids, each consisting of four carbon atoms, occur
in proteins; they are aspartic acid, asparagine. threonine, and
methionine. Aspartic acid and asparagine, which occur in large
amounts, can be synthesised by animals. Threonine and
methionine cannot be synthesised and thus are essential amino
acids - i.e., they must be supplied in the diet. Most proteins
contain only small amounts of methionine.
Ответьте на вопрос:
What do disulfide bonds do?
a) They link parts of protein molecules and provide formation
of loops in it.
b) Cystine is a sulfur containing amino acid.
c) There is a correlation between the structure and function of
a protein.
d) They link cysteine molecules in cysteine.
34.Прочитайте текст
STRUCTURE OF THE COMMON АМINO ACIDS
1. The ammo acids present in proteins differ from each other in
the structure of their side (R) chains. The simplest amino acid is
glycine, in which R is a hydrogen atom. In a number of amino
acids, R represents straight or branched carbon chains. One of
these amino acids is alanine, in which R is the methyl group (CH3). Valine, leucine and isoleucine. with longer R groups,
complete the alkyl side-chain series. The alkyl side chains (R
groups) of these amino acids are nonpolar; this means that they
have no affinity for water but some affinity for each other.
Although plants can form all of the alkyl amino acids, animals
can synthesise only alanine and glycine; thus valine, leucine, and
isoleucine must be supplied in the diet.
2. Two amino acids, each containing three carbon atoms, are
derived from alanine; they are serine and cysteine. Serine contains
an alcohol group (-CH2-OH) instead of the methyl group of
alanine, and cysteine contains a mercapto group (-CH2SH).
Animals can synthesise serine but not cysteine or cystine.
3. Cysteine occurs in proteins predominantly in its oxidized form
(oxidation in this sense meaning the removal of hydrogen atoms),
called cystine. Cystine consists of two cysteine molecules linked
by the disulfide bond (-S-S-) that results when a hydrogen atom is
removed from the mercapto group of each of the cysteine.
Disulfide bonds are important in protein structure because they
allow the linkage two different parts of a protein molecule to and thus the formation of loops in - the otherwise straight chains
Some proteins contain small amounts of cysteine with free
sulfhydryl (-SH) groups.
4. Four amino acids, each consisting of four carbon atoms, occur
in proteins; they are aspartic acid, asparagine. threonine, and
methionine. Aspartic acid and asparagine, which occur in large
amounts, can be synthesised by animals. Threonine and
methionine cannot be synthesised and thus are essential amino
acids - i.e., they must be supplied in the diet. Most proteins
contain only small amounts of methionine.
Определите основную идею текстa
a) Protein contains a great number of amino acids
b) Not all amino acids can be synthesised by animals.
c) Proteins also contain amino acids occurring in large
amounts in collagen, ould attend theatres.
d) There are different amino acids occurring in proteins and
their structures are different.
TEST F5
Вариант 4
Задание 1. Заполните пропуск
The _________ to the university begins after all the preliminary
examination.
a) graduation
b) acceptance
c) preparation
d) rendering
Задание 2. Заполните пропуск
Let's ____ the exact time and place of our meeting.
a) start
b) make
c) do
d) fix
Задание 3. Заполните пропуск
Nucleic acids are large, compel compounds of very high
molecular _____ present in the cells of all organisms.
a) weight
b) quantity
c) amount
d) length
Задание 4. Заполните пропуск
_____is a self-sustaining chemical or nuclear reaction yielding
energy or products that cause further reactions of the same kind.
a) Secondary reaction
b) Chain reaction
c) Self-sustaining reaction
d) Back reaction
Задание 5. Заполните пропуск
The cabin was _____________ furnished.
a) luxuriant
b) luxurious
c) luxuriate
d) luxuriously
Задание 6. Заполните пропуск
There is a new film on, but I haven't seen_______ yet.
a) he
b) him
c) it
d) its
Задание 7. Заполните пропуск
Sinking of the Titanic was the _______disaster of that time.
a) larger
b) very large
c) large
d) largest
Задание 8. Заполните пропуск
There are three chairs and _______armchair in the room.
a) an
b) the
c) a
d) –
Задание 9. Заполните пропуск
I entered _____Moscow State University last year.
a) from
b) in
c) to
d) –
Задание 10. Заполните пропуск
We enjoyed our walk _______the bad weather.
a) but
b) or
c) despite
d) it
Задание 11. Заполните пропуск
The train _______at 3 a.m. according to the schedule.
a) is leaving
b) leave
c) will leave
d) leaves
Задание 12. Заполните пропуск
Look at the tree! It is going_______.
a) falling
b) to have been fallen
c) to be falling
d) to fall
Задание 13. Заполните пропуск
- What are you doing here?
- I _______a book.
a) am looking after
b) am looking for
c) am looking forward to
d) am looking at
Задание 14. Заполните пропуск
You _______give me the name of someone we can contact for
reference.
a) сan
b) may
c) is to
d) have to
Задание 15. Выберите реплику, наиболее соответствующую
ситуации общения
Daughter: ''____________________
Mother: “:You’d better return home now."
a) I am going back home.
b) I want to do the shopping just now.
c) It is great to be at home again.
d) It looks like raining. I don't know what to do.
Задание 16. Выберите реплику, наиболее соответствующую
ситуации общения
Guest: "I want to speak to the manager!"
Receptionist: ''_______________"
a) She is not available at the moment. Can I help you?
b) She is busy now.
c) You can't do so!
d) You have to wait for some time. Be patient. please!
Задание 17. Выберите реплику, наиболее соответствующую
ситуации общения
Student: ''________________"
Tutor: "Yes, it was quite good".
a) What about my essay?
b) What did you do with my essay?
c) Didn't you mark my essay?
d) Have you had time to mark my essay?
Задание 18. Заполните пропуск
Visitor________________
Local Resident: Oh, you can get a bus ... any bus will take you
there.
a) Central Station.
b) Excuse me ... How can I get to Central Station, please?
c) I'm looking for Central Station.
d) Where is Central Station?
Задание 19. Заполните пропуск
The Tower is a ______ nowadays.
a) museum
b) prison
c) fortress
d) library
Задание 20. Заполните пропуск
The official home of the US President is______.
a) the National Capitol
b) the Empire State Building
c) the Golden Palace
d) the While House
Задание 21Заполните пропуск
There is_____on the official flag of Canada.
a) a red star
b) a number of stars and stripes
c) a red maple leaf
d) a green birch leaf
Задание 22. Заполните пропуск
The Queen's eldest son's name is_______.
a) Andrew
b) Edward
c) Charles
d) Philip
Задание 23. Расположите части, делового письма в
правильном порядке
a) I would like to reserve three single rooms from 18th to 22nd
December for three of our managers. Could you please inform
me of your rates and whether you offer discounts
for company bookings.
b) Managing Director. Miranda Hotel. 7 Moon Way.
New Coast City, NM 54021
c) I look forward to receiving your confirmation.
Yours faithfully.
________________
Susan Peacock
Secretary
d) Richman Rings Inc.. 34 Beddington Road. Gilmore.
GH23B
Phone number: 985 46 73 49: fax number: 985 45 87 29
12 December 2005
Задание 24. Перед Вами конверт
(1) Foreign Language Institute
555 (2) Deer Run Lane
Aurora, (3)CO 80014
(4) Sandberg Educational, Inc.
(5) Orchard Ridge Corporate
Park
Building Two, Fields Lane
(6) Brewster, NY 10509
Соотнесите информацию под определенным номером на
конверте с тем, что она обозначает.
a) the town in the mailing address
b) the addressee's company name
c) the ZIP Code in the return address
d) the sender's company name
e) the street name in the return address
f) the street name in the mailina address
Задание 25. Определите, к какому виду делового документа
относится представленный ниже отрывок
The goods will be considered as delivered by the Sellers and
accepted by the Buyers:
1) as regards the gross weight and the number of cases -| in
accordance with the weight and the number of cases stated in an
airway bill.
2) as regards the net weight and the quality- in accordance with
the Sellers' Specification. The date of an airway bill is to be
considered as the date of delivery.
a) Letter of application
b) Memo
c) CV
d) Contract
Задание 26. Выберите слова или сочетания слов для
заполнения пропусков так, чтобы они отражали
особенности оформления служебной, записки
(1)_____ : Purchasing Supervisor
From : Stock Manager
Subject : (2)_____
Date : (3)_____
We sent an order for juice to Brilliant Water on (4)_____but we
have still not had a delivery.
Please write to them and ask them when they can deliver the
juice. Their address is .........
Thanks
a) 26th March
b) To
c) order 86764
d) 15th April 2006
Задание 27. Прочитайте текст
CHEMICAL WARFARE
1. Chemical warfare is the use of chemical compounds in
warfare and the methods of combating such agents. The term
usually refers to the use of chemical agents, both lethal and
non-lethal, that attack the human organism by paralyzing the
nervous system; inducing temporary blindness, deafness,
paralysis; causing severe bums to skin, eyes, or lungs; or
stifling respiration. Also included are chemical defoliants and
herbicides for military purposes, such as those used in the
Vietnam War. World-wide revulsion toward chemical weapons
is embodied in the Geneva Protocol of 1925, prohibiting "the
use in war of asphyxiating, poisonous or other gases."
2 Toxic smokes and other toxic substances were used
occasional-ly in war from ancient times, but the earliest largescale use of chemical warfare agents was in World War I. It
was the German attack with chlorine released from thousands of
cylinders along a four-mile (six-kilometre) front at Ypres on April
22, 1915. that initiated the massive use of chemicals in that conflict.
3. As other gases and more effective delivery methods were
introduced, so too were improved defenses. The defense kept pace,
with the introduction of better gas masks, protective clothing, and
battlefield tactics for minimizing exposure. More than 100.000 tons
of various chemical warfare agents were used in World War I; but
gas was an unimportant weapon in overall military terms, largely
because of the effectiveness of defenses against it.
4. In World War П, chemical weapons were stockpiled by
both sides, but they were not used and were not integrated into
military planning. Records indicated various reasons for this:
military opinion that chemical weapons would be no more
effective than conventional weapons and would complicate
and delay operations, fear of retaliation, especially against
civilian centres, and aversion to gas warfare by political and
military leaders. Chemical weapons were used in only a few of
the more than 200 wars fought after World War I.
Определите, является ли утверждение:
Chemical defoliants and herbicides are used for military
purposes.
a) ложным
b) истинным
c) в тексте нет информации
Задание 28. Прочитайте текст
CHEMICAL WARFARE
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