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Biology/bio5
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron » Acornsoft_Educational.ADF |
Filename: | Biology/bio5 |
Read OK: | ✔ |
File size: | 14BD bytes |
Load address: | 1BF3 |
Exec address: | 1BF3 |
Duplicates
There are 4 duplicate copies of this file in the archive:
- AEW website » acornsoft_ib » acornsoft_ib_5_25_discs_Biology-Acornsoftib_HD-BIOL.dsd » bio5
- AEW website » acornsoft_ib » acornsoft_ib_tapes_Biology-Acornsoftib_Biology-IvanBerg_BE.uef » bio5
- Personal collection » Acorn ADFS disks » Electron » Acornsoft_Educational.ADF » Biology/bio5
- Personal collection » Acorn hard disk » zipped_disks » elk08 » acornsofte/Biology/bio5
- Personal collection » Acorn tapes » Commercial_Releases » box04_tape02a_acorn_acornsoft_biology_data.wav » bio5
File contents
14BE BIOLOGY 5 1 ENZYMES Chemical reactions in living organisms are controlled by enzymes. Enzymes are protein catalysts. Without them, reactions would be too slow or require impossible conditions (like boiling acid!). Enzymes are: Specific to one reaction. Affected by temperature. Dependent on pH (acidity). # 2 SPECIFICITY Every enzyme affects only one reaction. This is largely due to the 3-D structure of the molecule. Many poisons work by 'blocking' enzymes. p 0 # 3 TEMPERATURE A popular enzyme to work with is SALIVARY AMYLASE. This breaks down ('-ase') starch (amylose) into the sugar maltose. The reaction can be followed by colour changes of iodine solution (starch � blue). The rate is found to increase with temperature until about 60� C when the enzyme is destroyed. # 4 ACIDITY Enzymes are affected by acidity (pH). Each has an optimum pH at which it is most effective. If saliva is dropped onto blue starch/ iodine agar, the blue colour will clear. If the saliva is acidic, it will not. p 1 # 5 ENZYME EXPERIMENTS Typical results for enzyme experiments are shown in the graph. The X-axis displays temperature, the Y-axis activity. The three curves show the effect of pH at various temperatures. p 2 # 6 DIGESTION Digestion is the breaking down of large food molecules into particles small enough to be absorbed into the tissues. It may take place outside the organism (fungal hyphae, housefly), inside the body (mammals) or inside cells (amoeba). Digestion is controlled by enzymes. # 7 DIGESTIVE ENZYMES Digestive enzymes break up large food molecules into small ones for absorption. o S P F S STARCH � (AMYLASE) � � � MALTOSE��������GLUCOSE (MALTASE) p 3 P PROTEIN � (PEPSIN) � � � PEPTIDES��������AMINO- ACIDS (EREPSIN) p 4 F FAT � (LIPASE) � � � FATTY ACIDS AND GLYCEROL p 5 # 8 DIGESTIVE SYSTEM (GUT) The functions of the gut are to digest food and to absorb digested material into the blood system. Smell and taste of food stimulate the flow of saliva into the MOUTH. Saliva contains enzyme (AMYLASE) to digest starch. Food passes down the OESOPHAGUS by muscular squeezing - PERISTALSIS. p 6 # 9 STOMACH The stomach, a muscular sac, makes HYDROCHLORIC ACID. The HCl kills bacteria and provides the correct pH for PEPSIN action (pH 2 - 3) and enzymes. PEPSIN begins the breakdown of PROTEINS. (Note that RENNIN, PROTEIN which 'curds' milk � � in young mammals, � PEPSIN � (ACID) is absent from � humans.) PEPTONES & PEPTIDES # 10 VILLI Small intestine is lined with VILLI. Vast increase in surface area for absorbtion of AMINO-ACIDS and SUGARS into blood, FAT products into LACTEALS (lymph system). p 7 # 11 LIVER BILE (made in the LIVER, stored in the gall-bladder) emulsifies FAT for easy digestion. PANCREATIC JUICE contains enzymes: AMYLASE (as saliva) LIPASE (fat �� fatty acids & glycerol) TRYPSIN (protein �� peptides). Both bile and pancreatic juice are ALKALI; they neutralise stomach acid. Bile is coloured by the products of red blood cell breakdown. # 12 FUNCTIONS OF INTESTINES THE SMALL INTESTINE has a number of enzymes to complete the digestion of PROTEINS and CARBOHYDRATES. MALTOSE PEPTIDES � � � � � MALTASE � EREPSIN � � � � GLUCOSE AMINO-ACIDS The LARGE INTESTINE (COLON) has no enzymes but reabsorbs WATER. Faeces form in the RECTUM. # T #1 1 All chemical reactions in living animals and plants are controlled by ..... 1 ENZYMES ENZYME #2 1 What are enzymes made of? (1) carbohydrate (2) protein Type 1 or 2. 1 ^2 2 #3 1 Which two factors affect enzymes? (1) temperature and alkali (2) temperature and pH Type 1 or 2. 1 ^2 2 #4 1 What term means that each enzyme affects only one reaction? 1 SPECIFICITY #5 3 At what temperature is an enzyme destroyed? 1 ~(in degrees Centigrade) = 60 #6 3 Enzymes work faster: (1) in cooler temperatures. (2) in warmer temperatures. (3) at 0�C. (4) at boiling point. Type 1, 2, 3 or 4. 1 ^4 2 #7 4 The pH at which an enzyme works best is known as the ..... 1 OPTIMUM #8 6 The chemical breakdown of large food molecules into small particles for absorption is known as ..... 1 DIGESTION #9 8 (a) The wave of muscular contraction which passes down the gut is ..... (b) Which food is digested in the mouth? 2 ~ PERISTALSIS ~ STARCH #10 9 (a) Which protein-digesting enzyme is made in the stomach? (b) Which type of acid is produced in the stomach? 2 ~ PEPSIN ~ HYDROCHLORIC HYDROCHLORIC ACID #11 11 (a) Bile is made in the ..... (b) What name is given to fat-digesting enzymes? (c) Bile and pancreatic juice are not acid but ..... 3 ~ LIVER ~ LIPASE ~ ALKALI #12 10 What are the structures lining the small intestine? 1 VILLI #13 10 Unlike sugars and amino-acids, fat products are absorbed into ..... 1 LACTEALS #14 12 (a) An intestinal enzyme which produces amino-acids is ..... (b) What is the colon? 2 ~ EREPSIN ~ LARGE INTESTINE THE LARGE INTESTINE e
00000000 31 34 42 45 0d 42 49 4f 4c 4f 47 59 20 35 0d 31 |14BE.BIOLOGY 5.1| 00000010 20 45 4e 5a 59 4d 45 53 0d 43 68 65 6d 69 63 61 | ENZYMES.Chemica| 00000020 6c 20 72 65 61 63 74 69 6f 6e 73 20 69 6e 20 6c |l reactions in l| 00000030 69 76 69 6e 67 20 6f 72 67 61 6e 69 73 6d 73 0d |iving organisms.| 00000040 0d 61 72 65 20 63 6f 6e 74 72 6f 6c 6c 65 64 20 |.are controlled | 00000050 62 79 20 65 6e 7a 79 6d 65 73 2e 20 45 6e 7a 79 |by enzymes. Enzy| 00000060 6d 65 73 20 61 72 65 0d 0d 70 72 6f 74 65 69 6e |mes are..protein| 00000070 20 63 61 74 61 6c 79 73 74 73 2e 20 57 69 74 68 | catalysts. With| 00000080 6f 75 74 20 74 68 65 6d 2c 0d 0d 72 65 61 63 74 |out them,..react| 00000090 69 6f 6e 73 20 77 6f 75 6c 64 20 62 65 20 74 6f |ions would be to| 000000a0 6f 20 73 6c 6f 77 20 6f 72 20 72 65 71 75 69 72 |o slow or requir| 000000b0 65 0d 0d 69 6d 70 6f 73 73 69 62 6c 65 20 63 6f |e..impossible co| 000000c0 6e 64 69 74 69 6f 6e 73 20 28 6c 69 6b 65 20 62 |nditions (like b| 000000d0 6f 69 6c 69 6e 67 0d 0d 61 63 69 64 21 29 2e 0d |oiling..acid!)..| 000000e0 0d 45 6e 7a 79 6d 65 73 20 61 72 65 3a 0d 0d 53 |.Enzymes are:..S| 000000f0 70 65 63 69 66 69 63 20 74 6f 20 6f 6e 65 20 72 |pecific to one r| 00000100 65 61 63 74 69 6f 6e 2e 0d 0d 41 66 66 65 63 74 |eaction...Affect| 00000110 65 64 20 62 79 20 74 65 6d 70 65 72 61 74 75 72 |ed by temperatur| 00000120 65 2e 0d 0d 44 65 70 65 6e 64 65 6e 74 20 6f 6e |e...Dependent on| 00000130 20 70 48 20 28 61 63 69 64 69 74 79 29 2e 0d 23 | pH (acidity)..#| 00000140 0d 32 20 53 50 45 43 49 46 49 43 49 54 59 0d 45 |.2 SPECIFICITY.E| 00000150 76 65 72 79 20 65 6e 7a 79 6d 65 20 61 66 66 65 |very enzyme affe| 00000160 63 74 73 20 6f 6e 6c 79 20 6f 6e 65 0d 0d 72 65 |cts only one..re| 00000170 61 63 74 69 6f 6e 2e 20 54 68 69 73 20 69 73 20 |action. This is | 00000180 6c 61 72 67 65 6c 79 20 64 75 65 20 74 6f 20 74 |largely due to t| 00000190 68 65 0d 0d 33 2d 44 20 73 74 72 75 63 74 75 72 |he..3-D structur| 000001a0 65 20 6f 66 20 74 68 65 20 6d 6f 6c 65 63 75 6c |e of the molecul| 000001b0 65 2e 0d 0d 4d 61 6e 79 20 70 6f 69 73 6f 6e 73 |e...Many poisons| 000001c0 20 77 6f 72 6b 20 62 79 20 27 62 6c 6f 63 6b 69 | work by 'blocki| 000001d0 6e 67 27 0d 0d 65 6e 7a 79 6d 65 73 2e 0d 70 0d |ng'..enzymes..p.| 000001e0 30 0d 23 0d 33 20 54 45 4d 50 45 52 41 54 55 52 |0.#.3 TEMPERATUR| 000001f0 45 0d 41 20 70 6f 70 75 6c 61 72 20 65 6e 7a 79 |E.A popular enzy| 00000200 6d 65 20 74 6f 20 77 6f 72 6b 20 77 69 74 68 20 |me to work with | 00000210 69 73 0d 0d 53 41 4c 49 56 41 52 59 20 41 4d 59 |is..SALIVARY AMY| 00000220 4c 41 53 45 2e 20 54 68 69 73 20 62 72 65 61 6b |LASE. This break| 00000230 73 20 64 6f 77 6e 0d 0d 28 27 2d 61 73 65 27 29 |s down..('-ase')| 00000240 20 73 74 61 72 63 68 20 28 61 6d 79 6c 6f 73 65 | starch (amylose| 00000250 29 20 69 6e 74 6f 20 74 68 65 0d 0d 73 75 67 61 |) into the..suga| 00000260 72 20 6d 61 6c 74 6f 73 65 2e 0d 0d 54 68 65 20 |r maltose...The | 00000270 72 65 61 63 74 69 6f 6e 20 63 61 6e 20 62 65 20 |reaction can be | 00000280 66 6f 6c 6c 6f 77 65 64 20 62 79 20 63 6f 6c 6f |followed by colo| 00000290 75 72 0d 0d 63 68 61 6e 67 65 73 20 6f 66 20 69 |ur..changes of i| 000002a0 6f 64 69 6e 65 20 73 6f 6c 75 74 69 6f 6e 20 28 |odine solution (| 000002b0 73 74 61 72 63 68 20 96 0d 0d 62 6c 75 65 29 2e |starch ...blue).| 000002c0 20 54 68 65 20 72 61 74 65 20 69 73 20 66 6f 75 | The rate is fou| 000002d0 6e 64 20 74 6f 20 69 6e 63 72 65 61 73 65 0d 0d |nd to increase..| 000002e0 77 69 74 68 20 74 65 6d 70 65 72 61 74 75 72 65 |with temperature| 000002f0 20 75 6e 74 69 6c 20 61 62 6f 75 74 20 36 30 9d | until about 60.| 00000300 20 43 0d 0d 77 68 65 6e 20 74 68 65 20 65 6e 7a | C..when the enz| 00000310 79 6d 65 20 69 73 20 64 65 73 74 72 6f 79 65 64 |yme is destroyed| 00000320 2e 0d 23 0d 34 20 41 43 49 44 49 54 59 0d 45 6e |..#.4 ACIDITY.En| 00000330 7a 79 6d 65 73 20 61 72 65 20 61 66 66 65 63 74 |zymes are affect| 00000340 65 64 20 62 79 20 61 63 69 64 69 74 79 20 28 70 |ed by acidity (p| 00000350 48 29 2e 0d 0d 45 61 63 68 20 68 61 73 20 61 6e |H)...Each has an| 00000360 20 6f 70 74 69 6d 75 6d 20 70 48 20 61 74 20 77 | optimum pH at w| 00000370 68 69 63 68 20 69 74 20 69 73 0d 0d 6d 6f 73 74 |hich it is..most| 00000380 20 65 66 66 65 63 74 69 76 65 2e 0d 0d 49 66 20 | effective...If | 00000390 73 61 6c 69 76 61 20 69 73 20 64 72 6f 70 70 65 |saliva is droppe| 000003a0 64 0d 0d 6f 6e 74 6f 20 62 6c 75 65 20 73 74 61 |d..onto blue sta| 000003b0 72 63 68 2f 0d 0d 69 6f 64 69 6e 65 20 61 67 61 |rch/..iodine aga| 000003c0 72 2c 20 74 68 65 0d 0d 62 6c 75 65 20 63 6f 6c |r, the..blue col| 000003d0 6f 75 72 20 77 69 6c 6c 0d 0d 63 6c 65 61 72 2e |our will..clear.| 000003e0 20 49 66 20 74 68 65 20 73 61 6c 69 76 61 0d 0d | If the saliva..| 000003f0 69 73 20 61 63 69 64 69 63 2c 20 69 74 20 77 69 |is acidic, it wi| 00000400 6c 6c 0d 0d 6e 6f 74 2e 0d 70 0d 31 0d 23 0d 35 |ll..not..p.1.#.5| 00000410 20 45 4e 5a 59 4d 45 20 45 58 50 45 52 49 4d 45 | ENZYME EXPERIME| 00000420 4e 54 53 0d 0d 54 79 70 69 63 61 6c 20 72 65 73 |NTS..Typical res| 00000430 75 6c 74 73 20 66 6f 72 20 65 6e 7a 79 6d 65 20 |ults for enzyme | 00000440 65 78 70 65 72 69 6d 65 6e 74 73 0d 0d 61 72 65 |experiments..are| 00000450 20 73 68 6f 77 6e 20 69 6e 20 74 68 65 20 67 72 | shown in the gr| 00000460 61 70 68 2e 0d 0d 0d 54 68 65 20 58 2d 61 78 69 |aph....The X-axi| 00000470 73 20 64 69 73 70 6c 61 79 73 20 74 65 6d 70 65 |s displays tempe| 00000480 72 61 74 75 72 65 2c 0d 0d 74 68 65 20 59 2d 61 |rature,..the Y-a| 00000490 78 69 73 20 61 63 74 69 76 69 74 79 2e 0d 0d 0d |xis activity....| 000004a0 54 68 65 20 74 68 72 65 65 20 63 75 72 76 65 73 |The three curves| 000004b0 20 73 68 6f 77 0d 0d 74 68 65 20 65 66 66 65 63 | show..the effec| 000004c0 74 20 6f 66 20 70 48 20 61 74 0d 0d 76 61 72 69 |t of pH at..vari| 000004d0 6f 75 73 20 74 65 6d 70 65 72 61 74 75 72 65 73 |ous temperatures| 000004e0 2e 0d 70 0d 32 0d 23 0d 36 20 44 49 47 45 53 54 |..p.2.#.6 DIGEST| 000004f0 49 4f 4e 0d 44 69 67 65 73 74 69 6f 6e 20 69 73 |ION.Digestion is| 00000500 20 74 68 65 20 62 72 65 61 6b 69 6e 67 20 64 6f | the breaking do| 00000510 77 6e 20 6f 66 0d 0d 6c 61 72 67 65 20 66 6f 6f |wn of..large foo| 00000520 64 20 6d 6f 6c 65 63 75 6c 65 73 20 69 6e 74 6f |d molecules into| 00000530 20 70 61 72 74 69 63 6c 65 73 0d 0d 73 6d 61 6c | particles..smal| 00000540 6c 20 65 6e 6f 75 67 68 20 74 6f 20 62 65 20 61 |l enough to be a| 00000550 62 73 6f 72 62 65 64 20 69 6e 74 6f 20 74 68 65 |bsorbed into the| 00000560 0d 0d 74 69 73 73 75 65 73 2e 0d 0d 49 74 20 6d |..tissues...It m| 00000570 61 79 20 74 61 6b 65 20 70 6c 61 63 65 20 6f 75 |ay take place ou| 00000580 74 73 69 64 65 20 74 68 65 20 6f 72 67 61 6e 69 |tside the organi| 00000590 73 6d 0d 0d 28 66 75 6e 67 61 6c 20 68 79 70 68 |sm..(fungal hyph| 000005a0 61 65 2c 20 68 6f 75 73 65 66 6c 79 29 2c 20 69 |ae, housefly), i| 000005b0 6e 73 69 64 65 20 74 68 65 0d 0d 62 6f 64 79 20 |nside the..body | 000005c0 28 6d 61 6d 6d 61 6c 73 29 20 6f 72 20 69 6e 73 |(mammals) or ins| 000005d0 69 64 65 20 63 65 6c 6c 73 0d 0d 28 61 6d 6f 65 |ide cells..(amoe| 000005e0 62 61 29 2e 0d 0d 44 69 67 65 73 74 69 6f 6e 20 |ba)...Digestion | 000005f0 69 73 20 63 6f 6e 74 72 6f 6c 6c 65 64 20 62 79 |is controlled by| 00000600 20 65 6e 7a 79 6d 65 73 2e 0d 23 0d 37 20 44 49 | enzymes..#.7 DI| 00000610 47 45 53 54 49 56 45 20 45 4e 5a 59 4d 45 53 0d |GESTIVE ENZYMES.| 00000620 44 69 67 65 73 74 69 76 65 20 65 6e 7a 79 6d 65 |Digestive enzyme| 00000630 73 20 62 72 65 61 6b 20 75 70 20 6c 61 72 67 65 |s break up large| 00000640 20 66 6f 6f 64 0d 0d 6d 6f 6c 65 63 75 6c 65 73 | food..molecules| 00000650 20 69 6e 74 6f 20 73 6d 61 6c 6c 20 6f 6e 65 73 | into small ones| 00000660 20 66 6f 72 0d 0d 61 62 73 6f 72 70 74 69 6f 6e | for..absorption| 00000670 2e 0d 6f 0d 53 20 50 20 46 0d 53 0d 0d 0d 53 54 |..o.S P F.S...ST| 00000680 41 52 43 48 0d 0d 20 90 20 28 41 4d 59 4c 41 53 |ARCH.. . (AMYLAS| 00000690 45 29 0d 20 90 0d 20 90 0d 20 95 0d 0d 4d 41 4c |E). .. .. ...MAL| 000006a0 54 4f 53 45 91 91 91 91 91 91 91 96 47 4c 55 43 |TOSE........GLUC| 000006b0 4f 53 45 0d 0d 20 20 20 20 20 20 20 28 4d 41 4c |OSE.. (MAL| 000006c0 54 41 53 45 29 0d 70 0d 33 0d 50 0d 0d 0d 50 52 |TASE).p.3.P...PR| 000006d0 4f 54 45 49 4e 0d 0d 20 90 20 28 50 45 50 53 49 |OTEIN.. . (PEPSI| 000006e0 4e 29 0d 20 90 0d 20 90 0d 20 95 0d 0d 50 45 50 |N). .. .. ...PEP| 000006f0 54 49 44 45 53 91 91 91 91 91 91 91 96 41 4d 49 |TIDES........AMI| 00000700 4e 4f 2d 0d 20 20 20 20 20 20 20 20 20 20 20 20 |NO-. | 00000710 20 20 20 20 20 20 20 41 43 49 44 53 0d 0d 20 20 | ACIDS.. | 00000720 20 20 20 20 20 20 28 45 52 45 50 53 49 4e 29 0d | (EREPSIN).| 00000730 70 0d 34 0d 46 0d 0d 0d 46 41 54 0d 0d 20 90 20 |p.4.F...FAT.. . | 00000740 28 4c 49 50 41 53 45 29 0d 20 90 0d 20 90 0d 20 |(LIPASE). .. .. | 00000750 95 0d 0d 46 41 54 54 59 20 41 43 49 44 53 0d 0d |...FATTY ACIDS..| 00000760 41 4e 44 20 47 4c 59 43 45 52 4f 4c 0d 70 0d 35 |AND GLYCEROL.p.5| 00000770 0d 23 0d 38 20 44 49 47 45 53 54 49 56 45 20 53 |.#.8 DIGESTIVE S| 00000780 59 53 54 45 4d 20 28 47 55 54 29 0d 54 68 65 20 |YSTEM (GUT).The | 00000790 66 75 6e 63 74 69 6f 6e 73 20 6f 66 20 74 68 65 |functions of the| 000007a0 20 67 75 74 20 61 72 65 20 74 6f 20 64 69 67 65 | gut are to dige| 000007b0 73 74 0d 0d 66 6f 6f 64 20 61 6e 64 20 74 6f 20 |st..food and to | 000007c0 61 62 73 6f 72 62 20 64 69 67 65 73 74 65 64 20 |absorb digested | 000007d0 6d 61 74 65 72 69 61 6c 0d 0d 69 6e 74 6f 20 74 |material..into t| 000007e0 68 65 20 62 6c 6f 6f 64 20 73 79 73 74 65 6d 2e |he blood system.| 000007f0 0d 0d 53 6d 65 6c 6c 20 61 6e 64 20 74 61 73 74 |..Smell and tast| 00000800 65 20 6f 66 20 66 6f 6f 64 20 73 74 69 6d 75 6c |e of food stimul| 00000810 61 74 65 20 74 68 65 0d 0d 66 6c 6f 77 20 6f 66 |ate the..flow of| 00000820 20 73 61 6c 69 76 61 20 69 6e 74 6f 20 74 68 65 | saliva into the| 00000830 20 4d 4f 55 54 48 2e 0d 0d 53 61 6c 69 76 61 20 | MOUTH...Saliva | 00000840 63 6f 6e 74 61 69 6e 73 0d 0d 65 6e 7a 79 6d 65 |contains..enzyme| 00000850 20 28 41 4d 59 4c 41 53 45 29 20 74 6f 0d 0d 64 | (AMYLASE) to..d| 00000860 69 67 65 73 74 20 73 74 61 72 63 68 2e 0d 0d 46 |igest starch...F| 00000870 6f 6f 64 20 70 61 73 73 65 73 20 64 6f 77 6e 20 |ood passes down | 00000880 74 68 65 0d 0d 4f 45 53 4f 50 48 41 47 55 53 20 |the..OESOPHAGUS | 00000890 62 79 0d 0d 6d 75 73 63 75 6c 61 72 20 73 71 75 |by..muscular squ| 000008a0 65 65 7a 69 6e 67 20 2d 0d 0d 50 45 52 49 53 54 |eezing -..PERIST| 000008b0 41 4c 53 49 53 2e 0d 70 0d 36 0d 23 0d 39 20 53 |ALSIS..p.6.#.9 S| 000008c0 54 4f 4d 41 43 48 0d 54 68 65 20 73 74 6f 6d 61 |TOMACH.The stoma| 000008d0 63 68 2c 20 61 20 6d 75 73 63 75 6c 61 72 20 73 |ch, a muscular s| 000008e0 61 63 2c 20 6d 61 6b 65 73 0d 0d 48 59 44 52 4f |ac, makes..HYDRO| 000008f0 43 48 4c 4f 52 49 43 20 41 43 49 44 2e 20 54 68 |CHLORIC ACID. Th| 00000900 65 20 48 43 6c 20 6b 69 6c 6c 73 0d 0d 62 61 63 |e HCl kills..bac| 00000910 74 65 72 69 61 20 61 6e 64 20 70 72 6f 76 69 64 |teria and provid| 00000920 65 73 20 74 68 65 20 63 6f 72 72 65 63 74 20 70 |es the correct p| 00000930 48 0d 0d 66 6f 72 20 50 45 50 53 49 4e 20 61 63 |H..for PEPSIN ac| 00000940 74 69 6f 6e 20 28 70 48 20 32 20 2d 20 33 29 20 |tion (pH 2 - 3) | 00000950 61 6e 64 0d 0d 65 6e 7a 79 6d 65 73 2e 0d 20 20 |and..enzymes.. | 00000960 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000970 20 20 20 20 20 0d 50 45 50 53 49 4e 20 62 65 67 | .PEPSIN beg| 00000980 69 6e 73 20 74 68 65 20 62 72 65 61 6b 64 6f 77 |ins the breakdow| 00000990 6e 20 6f 66 0d 0d 50 52 4f 54 45 49 4e 53 2e 20 |n of..PROTEINS. | 000009a0 0d 0d 28 4e 6f 74 65 20 74 68 61 74 20 52 45 4e |..(Note that REN| 000009b0 4e 49 4e 2c 20 20 20 20 20 50 52 4f 54 45 49 4e |NIN, PROTEIN| 000009c0 0d 0d 77 68 69 63 68 20 27 63 75 72 64 73 27 20 |..which 'curds' | 000009d0 6d 69 6c 6b 20 20 20 20 20 20 20 20 20 90 0d 20 |milk .. | 000009e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000009f0 20 20 20 20 20 20 20 20 20 20 90 0d 69 6e 20 79 | ..in y| 00000a00 6f 75 6e 67 20 6d 61 6d 6d 61 6c 73 2c 20 20 20 |oung mammals, | 00000a10 20 20 20 20 20 20 20 90 20 20 50 45 50 53 49 4e | . PEPSIN| 00000a20 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 00000a30 20 20 20 20 20 20 20 20 20 20 20 20 90 20 20 28 | . 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