Biology · NEET-UG

NEET-UG 2025 · Code 45

2025360 marks90 questions

85 of its 90 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.

Source: NEET (UG) 2025, 4 May 2025, Test Booklet Code 45, Biology, published by NTA. The official PDF

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85 questions

Q914 marks
$The complex II of mitochondrial electron transport chain is also known as$
1. A $Cytochrome bc₁$
2. B $Succinate dehydrogenase$
3. C $Cytochrome c oxidase$
4. D $NADH dehydrogenase$
Q924 marks
$Polymerase chain reaction (PCR) amplifies DNA following the equation.$
1. A $N²$
2. B $2ⁿ$
3. C $2n + 1$
4. D $2N²$
Q934 marks
$What are the potential drawbacks in adoption of the IVF method?$
1. A $High fatality risk to mother$
2. B $Expensive instruments and reagents$
3. C $Husband/wife necessary for being donors$
4. D $Less adoption of orphans$
5. E $Not available in India$
6. F $Possibility that the early embryo does not survive Choose the correct answer from the options given below :$
Q944 marks
$What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog ?$
1. A $Aorta$
2. B $Pulmonary artery$
3. C $Pulmonary vein$
4. D $Vena cava$
Q954 marks
$Which one of the following statements refers to Reductionist Biology?$
1. A $Physico-chemical approach to study and understand living organisms.$
2. B $Physiological approach to study and understand living organisms.$
3. C $Chemical approach to study and understand living organisms.$
4. D $Behavioural approach to study and understand living organisms.$
Q964 marks
$Given below are two statements : Statement I : In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable. Statement II : DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism. In the light of the above statements, choose the most appropriate answer from the options given below :$
1. A $Both statement I and statement II are correct$
2. B $Both statement I and statement II are incorrect$
3. C $Statement I is correct but statement II is incorrect$
4. D $Statement I is incorrect but statement II is correct$
Q974 marks
$Epiphytes that are growing on a mango branch is an example of which of the following?$
1. A $Commensalism$
2. B $Mutualism$
3. C $Predation$
4. D $Amensalism$
Q984 marks
$From the statements given below choose the correct option :$
1. A $The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.$
2. B $Each ribosome has two sub-units.$
3. C $The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S.$
4. D $The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S.$
5. E $The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S.$