أهم 100 سؤال فى مادة احياء لغات الجزء الخامس الصف الثالث ثانوي

من طرف **حنين الصمت** الأربعاء 01 مايو 2013, 4:36 pm

الدرس في شكل نص مقروء

أهم 100 سؤال فى مادة احياء لغات - الجزء الخامس

A) Choose the correct answer and write it only in your answer sheet:

1.The number of nitrogenous bases that entered in the structure of gene that a protein

contain 150 amino acid is……. (900- 450 - 300 -150)

2. The sequences of amino acids in polypeptide chain …………..

a. can be determined through spiral form of DNA.

b. determines the sequence of nucleotides in DNA.

c. depends on the sequence of nucleotide in DNA.

3. Reverse transcriptase enzyme is used to convert ……..

(DNA into RNA - RNA intoRNA - RNA into DNA- DNA into protein )

4. From the structural proteins is ….

( pepsin - trypsin - thyroxin - keratin )

5. The ratio between the quantity of DNA in uterus cells and kidney's’ cells is

( 2:1 - 1:1 - 3:1 - l:2 )

B) Write the scientific term that is expressed by each of the following:

1. The blood group, which has no antigens &can transfer safely to any other blood group.

(Universal donor – Blood group O)

2.Genes are not linked completely due to crossing over, they are inherited independently

(Incomplete linkage)

3. An enzyme hydrolysis DNA completely, Doesn’t affect the proteins and RNA

(Deoxyribonuclease enzyme)

4. A Group of nitrogenous bases has single ring.

(Pyrimidine).

5. Enzyme used to built up DNA, its code present in viruses with RNA genome.

(Reverse transcriptase enzyme)

6. A kind of mutations occurs due to the effect of the environmental factors around the living Synthesis.

(Spontaneous Mutation)

7. All genes and DNA molecules in the body cell.

(Human genome)

8. A strain of bacteria causes pneumonia to mice and does not kill them.

(Non virulent bacteria)

9. A protein substance decrease the ability of viruses genetic material to duplicate.

(The interferon)