Model exam - 1 – Thanology

Which of the following relationship expresses the muscle’s oxygen consumption and the amount of accumulated lactic acid in it ?

A
B
C
D

•The following figure represents a polypeptide chain which (X) and ( Y ) are functional groups, so the two letters (A) and ( B ) represents……… bonds respectively

Covalent / peptide
Peptide / hydrogen
hydrogen / Peptide
Peptide / covalent

•The strongest evidence for that the genetic material is the reason for bacterial transformation in Griffith’s experiments is the ……….

Formation of a capsule to the strain (R)
Formation of a capsule to the strain (S)
Change of strain (S) characters into the strain (R)
None of the above

•The polar body is similar to somatic cell in the …..

Size
Stored food
Number of chromosomes
Membrane surrounding each of them

•The secretion of progesterone hormone decreases in the pregnant woman at …….

The decrease of estrogen hormone
The end of 9th month
The increase of estrogen hormone
The end of 2nd month

•Which of the following statements describes the relation between the embryo’s blood and mother’s blood ?

The blood circulation of each one of them is connected, till the complete formation of placenta in the fourth month of pregnancy
The blood transferred directly from the mother to the embryo throughout pregnancy
The blood circulation of each one of them is separated and the substances are not exchanged between them
The blood circulation of each one of them is separated, but some substances are transferred between them

•All the following forms of movement take place in a pea plant except ……

Cytoplasmic streaming
Tensile movement by tendrils
Tensile movement by pulling roots
Tropism

•A piece of DNA molecules contains 700 nitrogenous bases, where 200 bases of them are adenine (A). So, the number of hydrogen bonds in this piece of DNA is ……

1700
700
850
1400

•In the mature ovary of flower, the number of cells that decay after the double fertilization is …………. cells

5
6
7
8

•In a study by a researcher on six genes (X), ( Y ), (Z), (L), (M) and ( N ), he collected 6 samples from different tissues of a mouse and determined the amount of mRNA for the six genes in each tissue, then recorded his results in the opposite table. Which of the following genes is responsible for the building-up of insulin ?

(L)
(M)
(Z)
(N)

•The opposite diagram shows the arrangement of three articulating vertebrae, descendingly in size, Vertebrae (1), (2) and (3) respectively will be :

Lumbar – cervical – thoracic
Cervical – lumbar – thoracic
Thoracic- Cervical – lumbar
Lumbar-thoracic- Cervical

•When a bacterial cells is infected with a bacteriophage in which DNA is synthesized from the strain (T4) and the coat from the strain (T6), therefore the formed protein in the new virus will belong to the …….

Strain (T6)
Bacterial cells
Both of strains (T4)
Strain (T4)

•The number of free phosphate groups in plasmid is …..

1
3
0
2

•Which of the following molecules is transcribed and translated?

rRNA
mRNA
tRNA
DNA satellites

Which of the following figures expresses the direction of DNA replication?

A
B
C
D

•For treating a person that is bitten by a venomous snake, it is better to inject him with the ………

Antibodies
Interleukins
Chemokines
inteferons

•All the following are from The immune means to prevent the entry of the microbe into plant cells, except the ……..

Cell wall
Formation of tyloses
Deposition of gums
Formation of cork

•Which of the following glands is an immune gland?

Sweet gland
Thymus gland
Lacrimal gland
Salivary gland

•By using the hybrid DNA technique, the sequence of nucleotides of four pieces from DNA strands for four types of living organisms had been recognized as shown in the following table, study it, then answer:

•The least evolutionary relationship is between the two organisms no. ……

(2) and (4)
(1) and (2)
(1) and (3)
(3) and (4)

•The number of turns of a piece of DNA that contains 300 pairs of nucleotides is ………

60
15
30
90

•the following figures illustrate some types of blood cells:

•Which of the following choices represents the cell no.(1), (2), (3) and (4) respectively?

Phagocyte / Red blood cell / Lymphocyte / Macrophage
Macrophage / Phagocyte / Red blood cell / Lymphocyte
Macrophage / Phagocyte / Lymphocyte / Red blood cell
Lymphocyte / Red blood cell / Phagocyte / Macrophage

•“The separation speed of two DNA strands from each other is directly proportional to the number of hydrogen bonds between the two strands” , “ the hybridization can be done between two strands, one of them is DNA and the other is RNA” …………

The two statement are correct
The two statements are wrong
The first statement is correct and The second statement is wrong
The first statement is wrong and The second statement is correct

•Which of the following pair of ribs attaches indirectly to the sternum ?

The seventh
The eleventh
The ninth
The first and third

•In the opposite figure, the flower is characterized by being …..

Hermaphrodite that contains calyx and corolla
Male that contains perianth
Hermaphrodite that contains a perianth
Female that contains calyx and corolla

•Pollen grains is similar to zygospore in ……

The number of nuclei
The presence of thick wall
That both of them are formed in the unsuitable conditions
That both of them are formed in the suitable conditions

•The main product of the previous reaction is …

Dipeptide
Polypeptide
Water
Amino acids

•Which of the following statements is correct about Polypodium gametophyte ?

Haploid produced by sexual reproduction.
Haploid produced by asexual reproduction.
Diploid produced by sexual reproduction.
Diploid produced by asexual reproduction.

•In the following diagram, if you know that (X) represents the honey bee insect, answer:

•Both (Y) and (Z) represent the ……

Sperms and eggs respectively
sperms only
Eggs and sperms respectively
Eggs only

•All the following are from the applications of recombinant nucleic acid technique, except the ……

Modification of plants to make them more resistant to pests
Production of genetically modified plants
Production of human proteins In the bacterial cells
Usage of bacteria for detecting the presence of carcinogenic substances

Which of the following is correct about about the support, responsible for the straightening of herbaceous plants when irrigated with water ?

A
B
C
D

•Which of the following statements describes the sequences (A) and (B) correctly?

These strands can’t be separated by heat
Sequence (B) needs a higher temperature than sequence (A) to separate the two strands
Sequence (A) needs a higher temperature than sequence (B) to separate the two strands
Each of (A) and (B) sequences needs the same temperature to separate the two strands

•The nitrogenous bases (GAT) could pair with (CUA) in case of the …..

Binding if tRNA anticodon with the mRNA codon
Nucleic acid hybridization technique
DNA molecule
mRNA molecule

•The hormone that participates, with parathyroid hormone, in the regulation of calcium level in the blood is secreted from …..

Pancreas
Thymus gland
Pituitary gland
Thyroid gland

•all of the following statements are true about gastrin hormone, except …..

It works on the same organ that secrets it
Decreases the pH value of the medium
Decreases the pH value of the medium
It stimulates the secretion of the trypsinogen enzyme

•Which of the following is produced by the same vital process that is illustrated in the previous figure?

Sperms of aphid insect male
Spores of polypodium plant
Sperms of honey bee drone
Eggs of honey bee queen

•When drought occurred in a pond, and all the cells of two spirogyra alga filaments participate in the reproduction, where one of them contains 8 cells and the other contains 10 cells, therefore the number of resulted zygospores is ……

8
9
10
18

•Which of the following statements is correct about the properties hormones secreted by the endocrine glands ?

All effects of hormones are the stimulating type
Excreted in limited quantities, in milligrams
Contain carbon and hydrogen
Their effect lasts for a very short period of time, in millisecond

Which of the following expresses the change in the size of cells during the stages of spermatogenesis in the testis of an adult male?

A
B
C
D

•The increase in hydrogen ion concentration in the human urine acquires the urinary bladder and urethra with………

Cellular immunity
Different immune mechanisms
Non-specific immunity
Specific immunity

•Which of the following statements describes the opposite graph correctly

(X) represents inflammatory response, and (Y) represents the response by antibodies
(Y) represents the innate immunity, and (X) represents the acquired immunity
(Y) represents the humoral immunity, and (X) represents the cellular immunity
(X) and (Y) represents the first line of defense

•Vaccine is considered from the most important means to resist pathogens, where it is considered the pathogen itself in a weak or dead from, the researches had proved the efficiency of these vaccines as the effect of some of them continues for several years. So, it is expected that the role of the vaccine in disease resistance is stimulating the ………..

Body to form the effective and memory cells
Macrophages to engulf the pathogen
Body to form T-cells and natural killer cells
Plasma B-cells to form antibodies

•DNA in the cells of elephant is similar to DNA in the cells of tomato tree In the ………..

Number of DNA molecules
Length of DNA molecules
Types of genes that are present on DNA molecule
Types of nucleotides in DNA molecule

•The hydrogen bonds in each of the DNA and the antibody molecules act on ……..

Facilitating the decomposition of the molecules
Binding the carbon atoms
Binding the amino acids together
Determining the structural shape of the molecules

•All the following polymers are found mainly in the yeast cytoplasm, except……

Plasmids
Histone proteins
DNA polymerase enzymes
Ligase enzyme

•”The gene is a part of DNA that represents a code for several types of proteins ” , ” the codon always represents a code for one amino acids ” ,…….

The first statement is wrong and the second statement is correct
The first statement is correct and the second statement is wrong
The two statements are wrong
The two statements are correct

•The opposite figure illustrates the synthesis of casein protein that is found in milk, which of the following statements is correct?

Both processes (X) and (Y) take place in the Cytoplasm
Process (Y) takes place in the nucleus and process (X) takes place in the Cytoplasm
Process (X) takes place in the nucleus and process (Y) takes place in the Cytoplasm
Both processes (X ) and (Y ) take place in the nucleus

•If the sequence of nitrogenous bases in a part of mRNA strand is.

So, the sequence of nitrogenous bases in DNA template strand is …….

A
B
C
D

•Which of the following represents (X), (Y) and (Z) ?

A
B
C
D

•If the sequence on mRNA strand runs as follows:

•So, the number of anticodons that are resulted from this sequence is ……

8
6
3
5

•16 types of amino acids share in building a polypeptide chain formed of 250 amino acids, therefore the number of nitrogenous bases in mRNA that from the protein is ………

750
1500
753
250

Model exam – 1

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