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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 4651. |
Which amino acid does the base sequence UUU represent? |
| A. | methionine |
| B. | phenylalanine |
| C. | leucine |
| D. | glycine |
| Answer» C. leucine | |
| 4652. |
DNA molecules contain signaling information for proteins? |
| A. | in exons |
| B. | in replicas |
| C. | in intros |
| D. | none of these |
| Answer» B. in replicas | |
| 4653. |
A classic example of disease caused by point mutation? |
| A. | Skeletal hemorrhagic anemia |
| B. | Thalassemia |
| C. | down syndrome |
| D. | none of these |
| Answer» B. Thalassemia | |
| 4654. |
Where is the bar body? |
| A. | in sperms |
| B. | in male body cells |
| C. | in the ovules |
| D. | in female body cells |
| Answer» E. | |
| 4655. |
How will the sex of the child be determined in humans? |
| A. | from father's sex chromosomes |
| B. | measurement of sperm |
| C. | ovum measurement |
| D. | from mother's sex chromosomes |
| Answer» B. measurement of sperm | |
| 4656. |
What colors cannot a color blind person distinguish? |
| A. | green and yellow |
| B. | red and yellow |
| C. | red and green |
| D. | all colors |
| Answer» D. all colors | |
| 4657. |
Where does mutation occur? |
| A. | intros |
| B. | sistrons |
| C. | Proteins |
| D. | RNA |
| Answer» C. Proteins | |
| 4658. |
Most of the sex-linked traits of humans have genes? |
| A. | in the X chromosome |
| B. | in the Y chromosome |
| C. | in autosomes |
| D. | in all these |
| Answer» B. in the Y chromosome | |
| 4659. |
Minor changes that occur at the gene level are called? |
| A. | reverse mutation |
| B. | Progressive mutation |
| C. | point mutation |
| D. | chromosomal mutation |
| Answer» D. chromosomal mutation | |
| 4660. |
If a color blind woman marries a normal man, will she have children? |
| A. | color blind sons and daughters |
| B. | color blind sons and carrier daughters |
| C. | common sons and daughters |
| D. | color blind daughters and normal sons |
| Answer» B. color blind sons and carrier daughters | |
| 4661. |
Which blood group has antigens A and B but no antibodies? |
| A. | B |
| B. | O |
| C. | A |
| D. | FROM |
| Answer» E. | |
| 4662. |
What are the agglutinogens called 'A' and 'B', or what are these blood groups related to? |
| A. | blood plasma |
| B. | red blood cells |
| C. | white blood cells |
| D. | platelets |
| Answer» C. white blood cells | |
| 4663. |
Which of the following is a dominant genetic trait of humans? |
| A. | hemophilia |
| B. | astigmatism |
| C. | color blindness |
| D. | Rh+ |
| Answer» E. | |
| 4664. |
Which class of donor blood can be given to O class patient? |
| A. | O and AB |
| B. | O, A and B |
| C. | only O |
| D. | AB only |
| Answer» D. AB only | |
| 4665. |
What is the total number of autosomes in humans? |
| A. | 11 pair |
| B. | 16 pair |
| C. | 22 pair |
| D. | 23 pair |
| Answer» D. 23 pair | |
| 4666. |
What is the unit of inheritance? |
| A. | chromosome |
| B. | Jean |
| C. | phenotype |
| D. | genotype |
| Answer» C. phenotype | |
| 4667. |
Which scientist discovered that there are blood groups in humans? |
| A. | eugene duboy |
| B. | Karl Landsteiner |
| C. | Mendel |
| D. | Stanley Miller |
| Answer» E. | |
| 4668. |
Which class of blood can be given to a person of A blood group? |
| A. | A and B |
| B. | B and O |
| C. | A, B, AB एवं O |
| D. | A and O |
| Answer» E. | |
| 4669. |
What is an autosome? |
| A. | any other chromosome other than the sex chromosome |
| B. | Semiconductor |
| C. | sex-determining chromosome |
| D. | unicellular structure visible under a microscope |
| Answer» B. Semiconductor | |
| 4670. |
What can cause the disease 'Erythroblastosis fetalis' in the fetus? |
| A. | Bleeding |
| B. | synthesis of red blood cells |
| C. | hemophilia |
| D. | Diapedesis |
| Answer» C. hemophilia | |
| 4671. |
Approximately what percentage of people in the Indian population have Rh-element? |
| A. | 50% |
| B. | 65% |
| C. | 72% |
| D. | 95% |
| Answer» E. | |
| 4672. |
If a person has antigens A and B in their red blood cells, then what will be in their serum? |
| A. | antibody b |
| B. | antibody a |
| C. | these two |
| D. | none of these |
| Answer» E. | |
| 4673. |
Which persons act as carriers of color blindness? |
| A. | women |
| B. | Male |
| C. | these two |
| D. | none of these |
| Answer» B. Male | |
| 4674. |
What does a person's blood group depend on? |
| A. | on the number of red and white blood cells |
| B. | on the shape of red blood cells |
| C. | On the presence of hemoglobin [ |
| D. | in person jeans |
| Answer» E. | |
| 4675. |
If the father of a child is hemophilia and the mother is heterozygous, then what is the percent chance that the child will have hemophilia? |
| A. | 0% |
| B. | 50% |
| C. | 75% |
| D. | 100% |
| Answer» C. 75% | |
| 4676. |
What if both the parents are color blind? |
| A. | all children will be pigmented |
| B. | 75% of offspring will be color blind |
| C. | no child will be colorless |
| D. | half the offspring will be pigmented |
| Answer» B. 75% of offspring will be color blind | |
| 4677. |
What are the groups of genetic traits called? |
| A. | alleles |
| B. | genotypes |
| C. | dominant gene |
| D. | Phenotypes |
| Answer» C. dominant gene | |
| 4678. |
In a disease called phenylketonuria? |
| A. | sugar in urine |
| B. | Phenylalanine decreases in tissues |
| C. | gentisic acid is excreted in the urine |
| D. | Phenylalanine increases in tissues |
| Answer» E. | |
| 4679. |
The genetics of which trait is controlled by multiple alleles? |
| A. | blood group |
| B. | color blindness |
| C. | phenylketonuria |
| D. | sickle-blood anemia |
| Answer» B. color blindness | |
| 4680. |
In the Olympic Games,bar-nodulesare seen in saliva tests to test the gender of athletes. What are these objects related to? |
| A. | from autosomes |
| B. | X chromosome |
| C. | by male gender |
| D. | from Y chromosome |
| Answer» C. by male gender | |
| 4681. |
The trisomic individual for the twelfth pair of chromosomes is? |
| A. | turner syndrome |
| B. | klinefelter syndrome |
| C. | downs syndrome |
| D. | none of these |
| Answer» D. none of these | |
| 4682. |
Characteristics displayed in an organism are called? |
| A. | Phenotypes |
| B. | genotype |
| C. | Heterozygous |
| D. | Homozygous |
| Answer» B. genotype | |
| 4683. |
Who was the first user of the term 'chromosome'? |
| A. | altman |
| B. | waldair |
| C. | Beniden |
| D. | sanger |
| Answer» C. Beniden | |
| 4684. |
The genes that are in the homologous segment of the Y-chromosome are called? |
| A. | Autosomy |
| B. | Hollandrick |
| C. | Fully gender-attached |
| D. | mutant |
| Answer» C. Fully gender-attached | |
| 4685. |
Who was the discoverer of gender-linked inheritance? |
| A. | landsteiner |
| B. | maclung |
| C. | Mendel |
| D. | morgan |
| Answer» E. | |
| 4686. |
What is the cause of Turner Syndrome? |
| A. | point mutation |
| B. | Polyploidy |
| C. | Autosomy aneuploidy |
| D. | sex thread aneuploidy |
| Answer» E. | |
| 4687. |
Which of the following characteristics of human cannot be genetics? |
| A. | enamelless teeth |
| B. | Influenza |
| C. | erectile dysfunction |
| D. | wide nostrils |
| Answer» C. erectile dysfunction | |
| 4688. |
If the blood group of one of the parents is AB and that of the other is O, then the possible blood group of their child will be? |
| A. | A or B or AB or O |
| B. | A or B |
| C. | A or B or O |
| D. | A or AB or O |
| Answer» C. A or B or O | |
| 4689. |
The child of the mother of blood group O belongs to the blood group O, which blood group can the father of the child belong to? |
| A. | [B] |
| B. | A or B only |
| C. | AB only |
| D. | only O |
| Answer» E. | |
| 4690. |
More than one gene pair works for the inheritance of which trait in humans? |
| A. | phenylketonuria |
| B. | skin complexion |
| C. | laughter blood anemia |
| D. | color blindness |
| Answer» C. laughter blood anemia | |
| 4691. |
Characteristics whose genes are on the X chromosome are called? |
| A. | gender-linked |
| B. | gender-influenced |
| C. | gender-limited |
| D. | none of these |
| Answer» B. gender-influenced | |
| 4692. |
Which genotype reveals incomplete dominance in the inheritance of sickle blood anemia? |
| A. | AS |
| B. | AA |
| C. | SS |
| D. | none of these |
| Answer» B. AA | |
| 4693. |
By examining the presence of which in the cells of the amniotic fluid, the sex of the fetus can be determined? |
| A. | sex chromosome |
| B. | bar body |
| C. | kinetochore |
| D. | kaazmata |
| Answer» C. kinetochore | |
| 4694. |
A person with which of these chromosomes will have Klinefactor syndrome? |
| A. | XX |
| B. | XXY |
| C. | XO |
| D. | XY |
| Answer» C. XO | |
| 4695. |
If mother's blood group is 'O' and father's blood group is 'AB', then the child's blood group will be? |
| A. | O and AB |
| B. | B and AB |
| C. | AB and A |
| D. | A and B |
| Answer» E. | |
| 4696. |
What are allosomes? |
| A. | plant hormones |
| B. | cell organelles |
| C. | sex chromosome |
| D. | allele |
| Answer» D. allele | |
| 4697. |
What is the reason for the extreme diversity in organisms? |
| A. | Participation |
| B. | mutation |
| C. | polysomy |
| D. | Customization |
| Answer» C. polysomy | |
| 4698. |
Have hemorrhage? |
| A. | a pollution-occurring disease |
| B. | a genetic disorder |
| C. | a viral disease |
| D. | a bacterial disease |
| Answer» C. a viral disease | |
| 4699. |
Leukemia is a type of cancer characterized by abnormal growth of? |
| A. | white blood cell count |
| B. | number of bone cells |
| C. | in platelet count |
| D. | red blood cell count |
| Answer» B. number of bone cells | |
| 4700. |
Which of the following disease/diseases is caused by a mutant gene? |
| A. | sickle cell anemia |
| B. | hemophilia |
| C. | Thalassemia |
| D. | all of the above |
| Answer» E. | |