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Description: Free Online Test Papers for Biology Covers chapters Respiratory System and other Medical studies IX-XII CBSE Respiration NCERT Pulmonary
Number of Questions: 25
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Tags: Molecular Biology Biology Respiratory System Medical IX XII CBSE Respiration NCERT Pulmonary NTSE ICSE Science Chemistry Physics Math English Social Science Nucleic Acids Biotechnology and its Application Biotechnology and Its Applications Endoplasmic Reticulum Endomembrane System of Cell Physiology of Animal and Man Human Physiology Polysaccharides Carbohydrates
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Yeast-two hybrid system is used to study

  1. yeast replication

  2. yeast protein synthesis

  3. protein-protein interaction

  4. transcription

Show answer
Correct Option: C
Explanation:

The "yeast two-hybrid system," uses transcriptional reporters in yeast to indirectly reflect the interaction between two proteins. The term "two-hybrid" derives from the two classes of chimeric, or "hybrid," proteins used in each screen.

In microscopy, what is meant by resolution?

  1. It is the ability to distinguish between two very closely positioned object.

  2. Resolution is the size of an object.

  3. It is the number of times the image is magnified.

  4. It is the difference between an image and the actual object.

Show answer
Correct Option: A
Explanation:

The ability to distinguish between two very closely positioned object

Uricase is the marker enzyme for

  1. rat liver mitochondria

  2. rat liver peroxisome

  3. rat liver lysosome

  4. rat liver nucleus

Show answer
Correct Option: B
Explanation:

rat liver peroxisome

Which of the following statement is true?

  1. DNA is non-polar due to the highly charged phosphate backbone.

  2. DNA is polar due to the highly charged phosphate backbone.

  3. DNA is polar due to the highly charged sugar backbone.

  4. DNA is non-polar due to the highly charged sugar backbone.

  5. All of the above

Show answer
Correct Option: B
Explanation:

DNA is polar due to highly charged phosphate backbone.

Function of the smooth endoplasmic reticulum is

  1. synthesis of fatty acid

  2. synthesis of phospholipids

  3. detoxification

  4. all of the above

Show answer
Correct Option: D
Explanation:

all

Dextrose is

  1. D-glucose

  2. D-fructose

  3. glycogen

  4. starch

Show answer
Correct Option: A
Explanation:

D-glucose

Viral genome is made up of

  1. DNA

  2. RNA

  3. DNA or RNA

  4. DNA and RNA

Show answer
Correct Option: C
Explanation:

DNA or RNA

Molecular and cellular defect of cystic fibrosis is the

  1. defective chloride channel in epithelial cells leading to excessive mucus in the lungs

  2. defective chloride channel in the epithelial cells leading to no mucus in the lungs

  3. defective sodium channel in the epithelial cells leading to excessive mucus in the lungs

  4. defective sodium channel in the epithelial cells leading to no mucus in the lungs

  5. none of the above

Show answer
Correct Option: A
Explanation:

Defective chloride channel in epithelial cells leads to excessive mucus in lungs

Barr body is

  1. inactive X chromosome

  2. inactive Y chromosome

  3. active X chromosome

  4. active Y chromosome

Show answer
Correct Option: A
Explanation:

inactive x chromosome

The most accurate method to find out the molecular weight of protein is

  1. gel filtration

  2. SDS PAGE

  3. mass spectroscopy

  4. bradford assay

Show answer
Correct Option: C
Explanation:

mass spectroscopy

Which amino acid is the precursor for Seretonin, which is a neurotransmitter?

  1. Glysine

  2. Lysine

  3. Cysteine

  4. Tryptophan

Show answer
Correct Option: D
Explanation:

Tryptophan

Limulus amoebocyte lysate assay is used for the screening of

  1. endotoxins

  2. environmental pollution

  3. mutagens

  4. none of the above

Show answer
Correct Option: A
Explanation:

endotoxins

If 1 M HCl is diluted with water and the molarity of HCl is found out to be 10-8 Molar then, what will be the pH of diluted HCl?

  1. pH = 8

  2. pH > 7

  3. pH < 7

  4. pH = - 8

Show answer
Correct Option: C
Explanation:

pH < 7, whatever you dilute the acid it never became basic

Which of following is not an essential amino acid?

  1. Aspartate

  2. Lysine

  3. Leucine

  4. Isoleucine

Show answer
Correct Option: A
Explanation:

aspartate

Taurine is

  1. an amino acid found in muscles and brain

  2. an amino acid found in urine and kidney

  3. a neurotransmitter in brain

  4. none of the above

Show answer
Correct Option: A
Explanation:

amino acid found in muscle and brain

The hormone androgen is a

  1. protein

  2. glycoprotein

  3. lipid

  4. glycan

Show answer
Correct Option: C
Explanation:

Lipid

Mannitol is

  1. alcohol

  2. sugar alcohol

  3. polysachacchride

  4. lipid

Show answer
Correct Option: B
Explanation:

suger alcohol

Which of the following statement is true?

  1. Starch is water soluble.

  2. Starch is water insoluble.

  3. Starch is a structural polysaccharide.

  4. Starch has glucose linked by beta linkages.

Show answer
Correct Option: B
Explanation:

Strach is water insoluble

Genome is defined as the

  1. haploid DNA content of an organism

  2. total DNA content of an organism

  3. total number of chromosomes

  4. total number of base pairs in DNA

Show answer
Correct Option: A
Explanation:

haploid DNA content of an organism

Which of the following statement is true?

  1. One gene code for one protein

  2. Genome size is proportional to the number of genes in eukaryotes.

  3. Genome size may not be proportional to number of genes in eukaryotes

  4. Genetic codes are universal.

  5. None of the above

Show answer
Correct Option: C
Explanation:

genome size may not be proportional to number of genes in eukaryotes

Malignant tumors derived from the connective tissue are known as

  1. Carcinoma

  2. Lymphoma

  3. Blastoma

  4. Sarcoma

  5. None of the above

Show answer
Correct Option: D
Explanation:

Sarcoma

Which of the following organic compound is the most aboundant in a living cell?

  1. Glucose

  2. Water

  3. Sodium

  4. Mg

Show answer
Correct Option: A
Explanation:

Glucose

Which of the follwing DNA viruses have reverse transcriptase?

  1. HIV

  2. HBV

  3. HEV

  4. BMV

Show answer
Correct Option: B
Explanation:

HBV

Imaginal discs are characteristics of which animal's embryogenesis?

  1. Drosophila

  2. Chick embryo

  3. Xenopus

  4. Zebra fish

Show answer
Correct Option: A
Explanation:

Drosophila

Which of the following are CD4+ cells?

  1. T helper cells

  2. Cytotoxic T cells

  3. Natural killer T cells

  4. All of the above

Show answer
Correct Option: D
Explanation:

All of the above

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