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Final Revision 2022 1. After isolation group of antibodies from certain person we found that each group of antibody has special variable regions this refers to a- Body of this person has been infected by different agents of microbes b- This person is injected with vaccine c- Due to presence of only one microbe in his body d- Presence of different macrophage 2. B-plasma cell is characterized by a- Rich in endoplasmic reticulum b- Produced from division of t-cells c- Has little amount of cytoplasm d- Share in secretion of globulin of interferon 3. Which of the following is considered main lymphoid organs a- Bone marrow and thymus gland b- Spleen and lymph nodes c- Tonsils and payer’s patches d- Lymphocytes B and T cells 4. Lymphocytes have nucleus that has different shapes a- Stem lymphoid cells b- B-plasma cells c- Cells that attack bacterial infection and inflammation d- macrophages 5. Which of the following antibody mechanism that is responsible for weakness of antigen but don’t destroy it? a- agglutination and neutralization b- agglutination an precipitation c- neutralization and lysis d- neutralization and precipitation Page | 1

6. Which of the following is more accurate to attack forging microbes? a- Cellular membrane of cork b- Epidermis layer in plant c- Cell membrane of cortex d- Root hair 7. MHC protein is located on a- Multinucleated cells and monocytes b- B-plasma cells and TH c- Monocytes and TH d- Macrophage and B-lymphocytes 8. Which of the following statement is false about T-cytotoxic? a- Destroys cell by same method of NKC b- Its role is restricted to Cause perforating of antigen and destroy it c- Secrets perforating protein and lymphatic toxin to kill cells d- Has CD8 receptors 9. Immune response that work after invading plant with microbes a- Cork b- Gum c- Tylolses d- All the previous 10.

The smallest contraction unit in muscle above humerus a- Sarcomere b- No c- Muscle bundle d- Sarcomere

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11.

In 100 sarcomere there is 100 semi light area a- Sarcomeres found in polarized state and number of incomplete light areas is 2 b- Sarcomere has depolarized states and number of incomplete light area is 2 c- Sarcomere has depolarized state and number of incomplete light bands are 100 d- Sarcomere has depolarized state and has incomplete light bands is 99

12.

The similarity between scapula and sternum in that both of them are a- Axial skeleton b- Appendicular skeleton c- Has blood vessels d- Consists of cartilage

13.

From character of living cytoplasm a- Continuous Cytoplasmic streaming in cell in one direction b- Cytoplasmic streaming in cell in both direction c- Continuous cytoplasmic streaming outside cell in one direction d- Moves in straight line inside cell in one direction

14.

The very limited cartilage joint is found between vertebrae number a- Number 30 to 32 b- Number 24 to 25 c- Number 26 to 27 d- Number 32 to 33

15.

Wrist joint is a- Synovial limited motion b- Fibrous immovable c- Cartilage limited d- Synovial wide movement

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16.

Material keeps the physiological support is a- Cellulose b- Cutin c- Glucose d- Lignin

17.

Protein filaments that are immovable in muscle piece a- Actin b- Myosin c- Z lines d- All the previous

18.

When H area is disappeared from muscle the membrane of muscle is a- Polarized b- Depolarized c- Rest state d- Has positive charge from out side

19.

H zone is disappeared when a- Transverse links attaché to actin filaments and seprartion several times until occurrence complete contraction b- Transverse links attaché to actin filaments and pull them without separation until complete contraction c- Transverse links attaches to myosin filaments and pull them without separation until occurrence of complete contraction d- Transverse links attaches to actin filaments and pull them without sepration until complete contraction

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20.

Ali made training several times and in fast manner this leads to pain in muscle this pain refers to a- Changing glucose into glycogen that is oxidized anaerobically and this leads to accumulation of lactic acids b- Changing glucose into glycogen that is oxidized aerobically and accumulation of lactic acids c- Changing glycogen into glucose by anaerobic respiration and this leads to accumulation of lactic acids d- Changing glucose into glycogen that is oxidized aerobically and leads to accumulation with lactic acids 21.

Plant cell is inserted into sugary solution its concentration equals 16 % and its size decreases due to a- Concentration in vacuole equals 18% b- Concentration of vacuole equals 19% c- Concentration of glucose equals 10% d- All the previous 22.

Tendril attaches to solid object a- Wilt and then die b- Moves around solid object due to slowly growth of area that is far from support c- Move around solid object due to fast growth of area that doesn’t attaché to solid object d- Move around support due to fast growth of area that attaches to object

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23.

Gene mutation may take place in case of a- Klinfelters syndrome b- Ovum and sperm c- 4Turners syndrome d- all the previous

24.

Anticode for UAA is a- AUU b- TAT c- UAC d- No one of them

25.

Changing arrangement of genes on chromosomes number 7th leads to ………………..mutation a- Number chromosomal mutation b- Structural chromosomal mutation c- Genetic mutation d- All the previous 26.

The function of tRNA is a- Reading codon( three nucleotide) that are carried on rRNA and helps in translation process of genes and protein production b- Reading codon (4 nucleotides ) carried on rRNA and helps in translation of genes and production of protein c- Reading codon of three nucleotides carried on mRNA and helps in translation process and production of protein d- Reading codon of three letters carried on tRNA

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27.

Hybridization needs more temperature to separate the both sequences between 5- AAACCCGGGTACCAC) and a- 3 AAACCCGGGTACCAC5 b- 3TTTGGGGCGTACGAC5 c- 3 TTTGGGCCCATGCTC5 d- 3TAAGGGCCCATCCAC5

28.

First type of protein that is formed by recombinant DNA a- Hormones of alpha cells b- Taq polymerase enzymes c- Beta cells of pancreases d- Thyroid gland hormones

29.

In chain of protein is made up of 60 amino acids calculate the number of nucleotides on DNA that are transcript mRNA that translated into protein a- 183 nucleotide b- 180 nucleotide c- 90 nucleotide d- 100 nucleotide

30.

When human cell is infected by phage a- Produce modification enzymes then restriction enzymes b- Produces restriction enzymes then modification c- Production of polymerases then restriction d- No correct answer

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31.

Alpha cells is different from Beta cells in a- Somatic chromosomes number b- Sexual chromosomes number c- Genes where mRNA is transcript d- Sequences of nucleotides arrangement

32.

Ligase enzymes works effectively during all processes except a- DNA replication b- Repair damage of DNA c- DNA hyperdization d- Formation of recombinant DNA

33.

Formation of hybrid DNA depends on a- Presence of complementary bases pair b- Combination of identical strands of DNA c- Weakness of hydrogen bonds between nitrogenous basses d- DNA combines with another DNA not RNA

34.

All of the following share in the formation of antibody IgM except a- tRNA b- mRNA c- large ribosomal subunit d- promotor

35.

When valine amino acids combines with glycine this will form a- Hydrogen bonds between amino acids by dehydration enzymes b- Peptide bonds between amino acids by condensation enzymes c- Peptide bonds between amino acids by hydrolysis enzymes d- No correct answer

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36.

The sequence on DNA is TAC on DNA so the amino acid will be a- Glycine b- Methionine c- Lysine d- No correct answer

37.

Insertion of growth hormone genes into mice then left for a period then allow it to make mating and produces individual a- Double size than parent after injection b- Double size than parent before injection c- Same size of baby before injection d- No correct answer 38.

Translation process taken place in a- Nucleus b- Mitochondriac c- Cytoplasm d- Cytosol

39.

Function of reverse transcriptase enzymes a- Formation of single DNA strand from mRNA b- Formation of double strand DNA from mRNA c- Formation of double strand rRNA from mRNA d- Formation of strand DNA from tRNA

40.

Obtaining 100,000 copies of genes through vital processes called a- Phage b- Plasmid c- PCR d- All the previous

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