THIS IS A HERITAGE SPECIFICATION

H

Thursday 26 January 2012 – Morning hours

GCSE GATEWAY SCIENCE

ADDED SCIENCE B

B623/02 Product 1 Themes B3 C3 P3 (Higher Tier)

2. B 6 2 0 7 6th 0 you 1 two *

Candidates answer around the Question Newspaper.

A calculator may be used with this paper.

Timeframe: 1 hour

OCR supplied supplies:

None

Many other materials required:

•

Pencil

•

Ruler (cm/mm)

*

W

6

two

3

0

2

*

INSTRUCTIONS TO CANDIDATES

•

•

•

•

•

•

Compose your name, centre number and candidate amount in the boxes above. Please write evidently and in capital letters.

Use black ink. HB pad may be used to get graphs and diagrams simply. Answer the questions.

Read each question cautiously. Make sure you know what you have to do before you start your solution.

Write the answer to every single question in the space provided. Additional conventional paper may be used if necessary but you need to clearly show your candidate amount, centre number and question number(s).

Do not write inside the bar requirements.

INFORMATION TO GET CANDIDATES

•

•

•

•

•

The number of signifies is given in brackets [ ] by the end of each issue or component question.

A summary of physics equations is branded on page two.

The Periodic Table is usually printed on the back site.

The total volume of marks for this paper is 60.

This kind of document includes 24 pages. Any blank pages happen to be indicated.

В© OCR 2012 [Y/103/4259]

POWER (NF/CGW) 44052/5

OCR can be an exempt Charity

Start

2

EQUATIONS

speed =

distance

time taken

acceleration =

difference in speed

period taken

force = mass Г— speed

work done sama dengan force Г— distance

electric power =

work

time

kinetic energy =

1

mv2

2

potential energy sama dengan mgh

fat = mass Г— gravitational field durability

resistance sama dengan

В© OCR 2012

voltage

current

three or more

BLANK WEBPAGE

Question one particular begins on page 4.

YOU SHOULD DO NOT CREATE ON THIS SITE

В© OCR 2012

Start

4

Response all the questions.

Section A – Module B3

1

Rennin is a great enzyme that is used to make mozzarella cheese.

When added to milk, that makes the dairy curdle and form a great. It does this by making a protein referred to as casein.

(a) Bob and Jane investigate how long it requires rennin to curdle dairy at different pHs. That they plot all their results on the graph.

150

100

period

in

secs

50

zero

4

a few

(i)

В© OCR 2012

6

ph level

Finish the graph simply by drawing the very best curve.

several

8

[1]

5

(ii)

Bob says that the effects prove that ph level 6 is definitely the optimum ph level for rennin. Is Greg correct?..............................

Clarify your answer.

................................................................................................................................................................................................................................................................................ [1]

(b) An chemical called pepsin breaks down casein.

Casein is usually broken down in smaller molecules called amino acids. This occurs in the tummy.

(i)

Explain what happens to the amino acids up coming.

........................................................................................................................................................................................................................................................................................................................................................................................................................... [2]

(ii)

Pepsin comes with an optimum pH of 2.

Glance at the graphs.

Which in turn graph or perhaps graphs happen to be correct?

A

reaction

time

B

response

rate

you 2 three or more 4 a few 6 six

pH

you 2 three or more 4 5 6 six

pH

C

reaction

level

D

effect

time

you 2 3 4 5 6 six

pH

1 2 3 4 your five 6 several

pH

response..........................................................

В© OCR 2012

[1]

Turn over

six

(c) Rennin is made by simply cells in the stomach coating of bovine.

The framework of rennin is determined by GENETICS.

Explain just how....

Tags:

Do Family genes Determine Personality Traits Article

Kabbala and Halacha Article