Muhammad Imdad Ullah

MDCAT Biology MCQs: Molecular Genetics Practice Test

by
molecular biology practice test

Master high-yield MDCAT Biology MCQs on DNA replication, transcription, and genetics. Molecular Genetics Practice Test (PMDC test questions) to boost your entry test aggregate! MDCAT solved biology past paper questions, Molecular biology entry test preparation Pakistan, DNA structure and genetic code MCQs for MDCAT. Let us start the Online Molecular Genetics Practice Test now

QUIZ START

Online Molecular Genetics Practice Test for MDCAT Preparation

  • Transcription starts at
  • A molecule of tRNA has the anticodon sequence UAC. What will be the corresponding nucleotide sequence in the DNA?
  • During transcription, the nucleotide sequence of the DNA strand that is being coded is ATACG; then the nucleotide sequence in mRNA would be
  • Transcription occurs along a —————- template, forming an mRNA in the —————- direction
  • When out of 64 codons, 61 codons code for 20 types of amino acids, it is called
  • The model of DNA replication in which one strand is conserved, and the other is synthesized is
  • If the genetic code is made up of three nucleotides, then the total possible genetic code will be
  • In translation, the terminating codon is
  • RNA polymerase attaches to the ————— site on RNA
  • TATAAT box in eukaryotes is present —————- nucleotides before the start of transcription
  • Who for the first time checked the 64 nucleotides genetic code in lab
  • AUG is the start codon and carries ———— amino acid during translation of mRNA
  • According to the Watson-Crick model, what is the distance between two consecutive base pairs in a DNA double helix?
  • If a double-stranded DNA sample contains 28% Cytosine, what is the expected percentage of Adenine in the same sample?
  • Which histone protein binds to the linker DNA outside the core nucleosome octamer?
  • What is the approximate diameter of a nucleosome core particle without the linker DNA?
  • A chromosome with a centromere positioned near one end, producing one extremely short arm (p) and one long arm (q), is classified as:
  • Which chromosomal disorder results from non-disjunction leading to a trisomy of sex chromosomes with a karyotype of 47,XXY?
  • In prokaryotic DNA replication, which enzyme removes RNA primers and fills the gaps with complementary DNA nucleotides?
  • If $E.\ coli$ grown in heavy nitrogen ($^{15} N$) is transferred to light nitrogen ($^{14} N$) for two generations of replication, what percentage of DNA molecules will be hybrid ($^{15} N/^{14}N$)?
Online Molecular Genetics Practice Test for MDCAT Preparation

Practice Zoology MCQs Tests

Molecular Biology & Genetics MCQs

by

Ready to master the central dogma of molecular biology? Test your knowledge with this high-yield Molecular Biology & Genetics MCQs Quiz designed for students preparing for GRE Biology, MCAT, NEET, and university-level genetics exams. Challenge yourself on essential molecular biology concepts, including:

  • DNA Replication & Enzymes: Okazaki fragment lengths, DNA polymerase directionality, and ligase function.
  • Transcription & Translation: Initiator codons, tRNA anticodons, reading frames, and genetic code degeneracy.
  • Gene Expression & Structure: Central dogma pathways, antisense technology, and chromatin composition.

Whether you need a quick review of nitrogenous bases or want to sharpen your understanding of leading vs. lagging strands, this practice test covers the fundamental topics search engines and examiners prioritize most. Take the quiz now to benchmark your score, pinpoint weak areas, and ace your upcoming genetics exam!

QUIZ START

Online Molecular Biology & Genetics MCQs with Answers

  • Which of the following are initiator codons?
  • Which of the following is common to both leading and lagging strands
  • The two steps of the central dogma taken together are also a means of
  • The total number of different kinds of tRNA molecules in human cells is
  • Number of nucleotides in the DNA of a typical human chromosome is about
  • Among the nitrogenous bases involved in DNA and RNA formation, the double-ring base is
  • What is antisense technology?
  • There are 64 codons in the genetic dictionary as
  • Chromatin is made up of
  • Which statement is true
  • What is true about tRNA?
  • During translation, the nucleotide bases in mRNA are read at a time to produce a protein
  • Which of the following correctly represents the flow of genetic information
  • The model of DNA replication in which one strand is conserved, and the other is synthesized is
  • The enzyme that attaches the fragments of DNA is
  • The DNA polymerase only adds nucleotides to the end
  • The length of Okazaki fragments is ————— nucleotides.
  • The synthesis of RNA from DNA is
  • Anticodons are present on
  • The strand that is transcribed during transcription is
Molecular Biology & Genetics MCQs with Answers

Try General Knowledge Quizzes

High-Yield MDCAT Physics Measurement MCQs 3

by
High-Yield MDCAT Physics Measurement MCQs 3

Master MDCAT Physics Measurement MCQS Chapter 1 with 20 high-yield practice MCQs covering percentage errors, dimensional analysis, uncertainties, and unit conversions. MDCAT physics measurement MCQs questions with solutions, how to solve percentage uncertainty in simple pendulum MDCAT, high-yield physics MCQs for medical entry test, Dimensions of resistance and gravitational constant physics, Difference between systematic error and random error MDCAT. Let us start with the online MDCAT Physics Measurement MCQs now.

QUIZ START

Online High-Yield MDCAT Physics Measurement MCQs

  • While measuring the acceleration due to gravity by a simple pendulum, a student makes a positive error of 1% in the length of the pendulum and a negative error of 1.5% in the value of the time period. His percentage error in the measurement of $g$ by the relation $g=4\pi^2 (I/T^2)$ will be
  • The dimensions of $\frac{1}{2} at^2$ are of
  • The value of acceleration due to gravity is $9.8m/s^2$. Its value in $Km/min^2$ will be
  • If the length of rod A is $3.25\pm 0.01 cm$ and that of B is $4.19\pm 0.01 cm$, then rod B is longer than rod A by
  • If $M$ is the mass of Earth and R its Radium, the ratio of the gravitational acceleration to the gravitational constant is
  • The dimension of resistance is
  • The least count of a stopwatch is 0.10sec. The time of 20 vibrations of a pendulum is 40sec. The maximum possible percentage uncertainty in the time period is
  • Accuracy of measurement is determined by
  • The unit of percentage error is
  • The most accurate measurement out of the following is
  • Out of the following pairs, which one does not have identical dimensions
  • $v=\sqrt{\frac{E}{\rho}}$, if percentage uncertainty in $v=2$% and in $\rho=4$% then percentage uncertainty in $E$ is
  • The physical quantities not having the same dimensions are
  • To reduce the timing uncertainty, it is advisable to
  • Which one of the following about systematic error is incorrect?
  • 99.97 rounded off to three significant figures would give
  • Which of the followings measurements is more accurate? $M_1=1.0cm \pm 0.1cm$, $M_2=0.10cm \pm 0.01cm$, and $M_3=0.100cm \pm 0.001cm$
  • The distance $x=x_2-x_1$ determined by the difference between two separate position measurements $X_1=12.2\pm0.2cm$ and $X_2=16.2\pm0.1cm$ is recorded as
  • Three students measured the length of the same needle. Student A measured with a micrometer screw gauge, B with vernier callipers, and C with a meter rod. Which would have greater experimental accuracy in the result?
  • Which of the following are base units of pressure?
High Yield MDCAT Physics Measurement MCQs

Learn R Programming Language

Molecular Biology Genetics MCQs MDCAT 2

by
Genetics MCQs MDCAT

Challenge your molecular biology knowledge with this 20-question quiz. Genetics MCQs MDCAT Quiz Covers DNA double helix structure, Okazaki fragments, genetic code degeneracy, mutations, and eukaryotic translation. Let us start with the online Molecular Biology Genetics MCQS MDCAT Quiz Preparation Quiz now

QUIZ START

Online Molecular Biology & Genetics MCQs MDCAT Quiz

  • UGA codon in mitochondria reads
  • If the DNA in all of the cells of an adult human were lined up end to end, it would stretch nearly
  • The number of stop codons that do not code for any amino acids is
  • The number of triplet codons having all three bases the same in 64 triplet codons is
  • In a nucleotide having a cytosine base and linked to sugar by a glycosidic bond at carbon number
  • The DNA molecule had a shape of a helix with a diameter of
  • The diameter of the DNA double helix remains constant because of
  • Length of Okazaki fragments in eukaryotes is a bout
  • Which of the following enzymes is present at the replication fork
  • The codons which code for the same amino acid are called
  • In RNA, thymine is replaced by
  • Which of the following RNAs picks up a specific amino acid from the amino acid pool in the cytoplasm to the ribosome during protein synthesis
  • Which of the following is non-genetic and is utilized for protein synthesis
  • Each amino acid in a protein is specified by
  • The three-nucleotide codon system can be arranged into ————— combinations
  • What would happen if, in a gene encoding a polypeptide of 50 amino acids, the 25th codon UAU is mutated to UAA?
  • The biological process shown in the diagram is
  • The two polynucleotide chains in DNA are
  • Which of the following is correct regarding the genetic code
  • The new strand synthesized in small pieces and then joined together during DNA replication is called

Try Online Zoology MCQs Test

Chromosomes and DNA Quiz for MDCAT 1

by
Chromosomes and DNA Quiz

Prepare for MDCAT 2026 with this Chromosomes and DNA Quiz featuring 20 important Biology MCQs on DNA structure, RNA, genetic code, DNA replication, transcription, translation, nucleotide bonding, hydrogen bonding, DNA ligase, DNA polymerase, codons, tRNA, and protein synthesis. Test your conceptual understanding of molecular biology and identify areas that need further revision.

This MDCAT Biology quiz includes questions covering important concepts such as DNA and RNA bases, complementary base pairing, termination codons, genetic code, amino acids, mRNA processing, tRNA, DNA replication enzymes, nucleotide addition, DNA ligase, and hydrogen bonds between nitrogenous bases. It is suitable for students preparing for MDCAT 2026, medical college entrance tests, and Biology examinations.

QUIZ START

Chromosomes and DNA Quiz for MDCAT with Answers

  1. Which of the following factors is responsible for joining the small subunit to mRNA
  2. Which of the following is a termination codon
  3. In bacteria, newly synthesized mRNA is released in
  4. The base sequence ATTG on DNA specifies the sequence for RNA
  5. The number of amino acids commonly used to synthesize proteins in living things?
  6. What is the effect of the enzyme DNA ligase?
  7. Biochemical analysis of DNA shows that cytosine forms 40% of nitrogenous bases; what will be the percentage of adenine
  8. Which of the following is present in both DNA and RNA
  9. Which of the following bases is never found in RNA
  10. The process of nucleotide addition is only done by
  11. In centrifugation, the gel is used
  12. Adenine forms how many hydrogen bonds with thymine
  13. When two nucleotides join each other, what type of bond is formed
  14. Which of the following bonds exists between the bases in the DNA helix
  15. The enzyme controls the unwinding of the double helix
  16. Human cells contain about ————— kinds of tRNA
  17. Polymerase only adds nucleotides on 3 direction when —————— is attached to the parent strand
  18. Which of the following is not a stop codon?
  19. The cap and tail save the mRNA from a variety of
  20. Genetic code is
Online Chromosomes and DNA quiz for MDCAT

Online Zoology Quiz with Answers