Biology
Comprehensive biology quiz covering biochemistry, molecular biology, genetics, immunology, virology, and laboratory techniques for IX-XII CBSE level students
Questions
Yeast-two hybrid system is used to study
- yeast replication
- yeast protein synthesis
- protein-protein interaction
- transcription
In microscopy, what is meant by resolution?
- It is the ability to distinguish between two very closely positioned object.
- Resolution is the size of an object.
- It is the number of times the image is magnified.
- It is the difference between an image and the actual object.
Uricase is the marker enzyme for
- rat liver mitochondria
- rat liver peroxisome
- rat liver lysosome
- rat liver nucleus
Which of the following statement is true?
- DNA is non-polar due to the highly charged phosphate backbone.
- DNA is polar due to the highly charged phosphate backbone.
- DNA is polar due to the highly charged sugar backbone.
- DNA is non-polar due to the highly charged sugar backbone.
- All of the above
Function of the smooth endoplasmic reticulum is
- synthesis of fatty acid
- synthesis of phospholipids
- detoxification
- all of the above
Dextrose is
- D-glucose
- D-fructose
- glycogen
- starch
Viral genome is made up of
- DNA
- RNA
- DNA or RNA
- DNA and RNA
Molecular and cellular defect of cystic fibrosis is the
- defective chloride channel in epithelial cells leading to excessive mucus in the lungs
- defective chloride channel in the epithelial cells leading to no mucus in the lungs
- defective sodium channel in the epithelial cells leading to excessive mucus in the lungs
- defective sodium channel in the epithelial cells leading to no mucus in the lungs
- none of the above
Barr body is
- inactive X chromosome
- inactive Y chromosome
- active X chromosome
- active Y chromosome
The most accurate method to find out the molecular weight of protein is
- gel filtration
- SDS PAGE
- mass spectroscopy
- bradford assay
Which amino acid is the precursor for Seretonin, which is a neurotransmitter?
- Glysine
- Lysine
- Cysteine
- Tryptophan
Limulus amoebocyte lysate assay is used for the screening of
- endotoxins
- environmental pollution
- mutagens
- none of the above
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?
- pH = 8
- pH > 7
- pH < 7
- pH = - 8
Which of following is not an essential amino acid?
- Aspartate
- Lysine
- Leucine
- Isoleucine
Taurine is
- an amino acid found in muscles and brain
- an amino acid found in urine and kidney
- a neurotransmitter in brain
- none of the above
The hormone androgen is a
- protein
- glycoprotein
- lipid
- glycan
Mannitol is
- alcohol
- sugar alcohol
- polysachacchride
- lipid
Which of the following statement is true?
- Starch is water soluble.
- Starch is water insoluble.
- Starch is a structural polysaccharide.
- Starch has glucose linked by beta linkages.
Genome is defined as the
- haploid DNA content of an organism
- total DNA content of an organism
- total number of chromosomes
- total number of base pairs in DNA
Which of the following statement is true?
- One gene code for one protein
- Genome size is proportional to the number of genes in eukaryotes.
- Genome size may not be proportional to number of genes in eukaryotes
- Genetic codes are universal.
- None of the above
Malignant tumors derived from the connective tissue are known as
- Carcinoma
- Lymphoma
- Blastoma
- Sarcoma
- None of the above
Which of the following organic compound is the most aboundant in a living cell?
- Glucose
- Water
- Sodium
- Mg
Which of the follwing DNA viruses have reverse transcriptase?
- HIV
- HBV
- HEV
- BMV
Imaginal discs are characteristics of which animal's embryogenesis?
- Drosophila
- Chick embryo
- Xenopus
- Zebra fish
Which of the following are CD4+ cells?
- T helper cells
- Cytotoxic T cells
- Natural killer T cells
- All of the above