Bio Lab

1. On of the following are used as negative control

Starch

Potato

Distelled water

Onion

2. The toxic H2O2 can broken by

Lipase

Protaeas

Catecholase

Catalase

3. The part of the microscope that fix the slide in the place is the

Nosepiece

Stage clip

Body tube

Eye piece

4. وهاد السؤال بونص الكم دكاترتنا

لجنة الطب البشري

- بتتمنالكم التوفيق بامتحانكم

ربنا يفتحها عليكم وينور بصيرتكم

- قدها والله

All of the above

5. The dye used to stain animal cells (cheek) is:

Methylene blue

Lugols iodine

Acid-fast

Safranin

6. One of the following is mismatched

Vitamin c / indophenol

Benedict s test positive color is red orange

Starch / reducing sugar

Biuret test / peptide bond

7. The final electrons receptors in the process of fermentation is

O2

H

C

Organic molecules

8. Reducing sugar have

Bounded to aldehyde or ketone

Modified aldehyed or ketone

Free aldyhyed or ketone

Both aldyhyed or ketone

9. The richest source of vitamin c is

Orange

Lemon

Grapes

Potato

10. CO2 in cellular respiration is produced from

Phoshorelation

Inhalation

Exhalation

Activation

11. Once your using the oil immersion lens then you are at total magnification of

100

40

400

1000 or 1500

10

12. – you prepared a wet mount slide for an animal cell . In order to have a better contrast for your specimen , you will :

. increase the light intensity

. decrease the light intensity

. stain it with methylene blue

Stain it with logo's iodine

13. Keeping the enzymes at refrigerator at 4 c will lead to

Activation

Inactivation

Denaturation

Renaturation

14. You want to examine a prepared slide under the microscope but while you are preparing your microscope you noticed a lot of dust on the glass part so in order to clean them you will use

Tissue paper

Filter paper

Lens paper

Optiona piece of cloth

15. The electron and proton acceptor in the equations below is glucose + yeast + methylene blue ---- x + leukomethylene

Methylene blue

Glucose

Leukomethylene

X

16. Which of the following statements is false

Glycolysis can occur with or without oxygen

Glycolysis occur in the mitochondria

Glycolysis is the first step in both aerobic and anaerobic respiration

Glycolysis produces 2 atp 2 nadph and 2 pyruvate

17. During your lap work you prepared a wet amount slide for plant cell the source of specimen

Human cheek epithelum

A slice of potato

Onion epidermis

A leaf

18. Having blue color in the dehydrogenase enzyme activity experiments means

The enzyme is active

The enzyme is inactive

The sample is a negative control

Either a or c is correct

Either b or c is correct

19. Which of the following states are correct about phospholibids

Hydrophobic tails of phospholipid face the watery environment

Hydrophobic head of the phospholipid face the watery environment

Hydrophilic head of phospholipid face the watery environment

The linkage between glycerol and the tail is phosphodiester bond

Both a and c

20. A student was given an unknown sample and she was asked to detect contests by applying different test to it. in order to do this she divided the sample into 3 tubes(1,2,3) and applied Benedict's, Biuret, and starch test and the result were : green, blue and brown, respectively. So, mostly the sample contains:

Peptide bond

Free aldehyde or Ketone groups

Bounded aldehyde or Ketone groups

Starch

Vitamin C

None of the above

21. The total ATP yield in the process of respiration

30

32

34

36

22. The positive results for having catalase activity is ______________, and the source of this enzyme including your lab work was __________.

Pinkish /brown color, potato Tubers

No colot, potato tubers

Releasing O2 bubbles, potato tubers

Releasing O2 bubbles, yeast

No color, yeast

23. The solubility of fats and lipids in different solvent depends on

Polarity of soluation

Two answers are correct

Polarity of the solvent

Amount of water

Depends on nothing

24. Which on of the following part of microscope is use for sharpening of the image

Fine focus adjustment knob

Coarse focus adjustment knob

The iris diaphram

The condeser lens

25. Having violet color after adding biuret reagent to your specimen means that this specimen may contain

Peptide bonds

Biuret compound

Protein

All of the above

26. هل انت مدريدي ولا برشلوني

(YMHمدريدي (تحياتي الك شخصيا من

(برشلوني (عنا 12 ابطال هههههه

اخرين

شو انك فاضي

27. You have four types of juices A, B, C and d and you apply the final test to detect the amount of ascorbic acid (vitamin C) the research shows that 3, 10, 6 and 17 drops respectively were needed to turn the indophenol into colorless but this is juices in an ascending Arrangement depending on the amount of ascorbic acid each have:

. A, B, C then D

A, C, D, then D

D, B, C then A

A, C, B then D

B, A, D then C

28. In order to detect the presence of a reducing sugar you will use:

Copper sulfate and sodium hydroxide solution

Copper sulfate solution under alkaline conditions

Lugol's iodine

Indophenol

29. All these statement are true execpt

Compound microscope reveals 2d image

Dissecting microscope is useful for large transparent speciman

Oil immersion specimen with total magnification of 100 times

B+c

30. The site where ribosomal subunits are synthesized is :

Nucleolus

Nucleus

Rough ER

Cytoplasm

31. The enzyme dehydrogenase removes hydrogen atoms from glucose and transfer them to :

NAD+

Various hydrogen acceptors

Electrons acceptor dyes like methylene blue when we use it experimentally

All of the above

32. All of the following are shared between animal and plant cells except :

Peroxisomes

Centrioles

Lysosomes

Cytoskeleton

33. According to the " anaerobic respiration of yeast " experiment , we must wrap each tube with aluminium foil in order to :

Prevent oxygen diffusion

Ensure that aerobic respiration will occur

Prevent photosynthesis

To prevent photosynthesis and oxygen diffusion

34. Nucleoid region is :

Contains the bacterial chromosome

Surrounded by a nuclear envelope

Is presented in plants and bacterial cells

A part of the nucleus