Biology Questions
What is the pattern of inheritance for polygenic trait?
Which of the following are the post-transcriptional events in an eukaryotic cell? A. Transport of pre-mRNA to cytoplasm prior to splicing B. Removal of introns and joining of exons C. Addition of methyl group at 5’ end of hnRNA D. Addition of adenine
A specialized membranous structure in a prokaryotic cell which helps in cell wall formation, DNA replication and respiration is:
Given below are two statements: Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R): The egg apparatus has 2 polar nuclei.
Identify the part of a bio-reactor which is used as a foam breaker from the given figure.
Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the Nephron?
In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:
Find the correct statements: A. In human pregnancy, the major organ systems are formed at the end of 12 weeks. B. In human pregnancy the major organ systems are formed at the end of 8 weeks. C. In human pregnancy heart is formed after one month of ge
Match List-I with List-II. List-I List-II A. Chlorophyll a I. Yellow-green B. Chlorophyll b II. Yellow C. Xanthophylls III. Blue-green D. Carotenoids IV. Yellow to Yellow-orange Choose the option with all correct matches.
Match List-I with List-II. List-I List-II A. Centromere I. Mitochondrion B. Cilium II. Cell division C. Cristae III. Cell movement D. Cell membrane IV. Phospholipid bilayer
Which are correct: A. Computed tomography and magnetic resonance imaging detect cancers of internal organs. B. Chemotherapeutics drugs are used to kill non-cancerous cells. C. α-interferon activate the cancer patients’ immune system and helps in dest
The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg B. Attachment of gametophyte to substratum C. Reduction division to produce haploid spores D. Formation of sporophyte E. Release of antherozoids into
Find the statement that is NOT correct with regard to the structure of monocot stem.
Name the class of enzyme that usually catalyze the following reaction: S–G + S# → S + S#–G
Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
In the above represented plasmid an alien piece of DNA is inserted at EcoRI site. Which of the following strategies will be chosen to select the recombinant colonies?
Given below are two statements: Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
Which of the following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc
Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones
Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte E. Tra
Match List-I with List-II. List-I List-II A. Head I. Enzymes B. Middle piece II. Sperm motility C. Acrosome III. Energy D. Tail IV. Genetic material
While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alime
Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
Which of the following statement is correct about location of the male frog copulatory pad?
Which chromosome in the human genome has the highest number of genes?
Streptokinase produced by bacterium Streptococcus is used for
Given below are two statements: Statement I: In a floral formula ⊕ stands for zygomorphic nature of the flower, and G stands for inferior ovary. Statement II: In a floral formula ⊕ stands for actinomorphic nature of the flower and G stands for superi
Which of the following is an example of non-distilled alcoholic beverage produced by yeast?
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R): The flowers produce enormous
Match List-I with List-II. List-I A. Emphysema B. Angina pectoris C. Glomerulonephritis D. Tetany List-II I. Rapid spasms in muscle due to low Ca²⁺ in body fluid II. Damaged alveolar walls and decreased respiratory surface III. Acute chest pain when
Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
Which one of the following is an example of ex-situ conservation?
From the statements given below choose the correct option: A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 3
Epiphytes that are growing on a mango branch is an example of which of the following?
Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions
Which one of the following statements refers to Reductionist Biology?
What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
What are the potential drawbacks in adoption of the IVF method?
Polymerase chain reaction (PCR) amplifies DNA following the equation:
The complex II of mitochondrial electron transport chain is also known as: