List of top Life Science Questions asked in Common University Entrance Test

Choose the correct sequence of different regions on a typical eukaryotic DNA segment when we go from the upstream to the downstream of a transcription start point.
A. Initiation site
B. CAAT box
C. Enhancer
D. TATA box
Choose the correct answer from the options given below:
Choose the correct sequence of events as they occur during a bacterial transcription
A. RNA polymerase sigma (\(\sigma\)) subunits recognizes promoters
B. DNA double helix unwind
C. Sigma (\(\sigma\)) subunit dissociates from the holoenzyme
D. Formation of hairpin secondary structure
Choose the correct answer from the options given below:
Choose the correct answer regarding the translation of mRNA to proteins when AUG is the start codon and codes for methionine.
The left-handed helix, Z-DNA is 18 \AA \ (1.8 nm) in diameter which contains _____________________.
Match LIST-I with LIST-II
Choose the correct answer from the options given below:
The plants bloom when the light duration is less than 12 hours per day are know as.
A rock body through which ground water flows is called
The F\(_1\) hybrid (Rr Ii) is crossed with a variety double recessive for both the traits. How many types of zygotes will be produced in the cross?
Match LIST-I with LIST-II
Choose the correct answer from the options given below:
Which one of the given statement is not correct about plant viruses ?
Hepatitis C virus can cause liver cancer. It has:
The role of slow sand filters in water treatment facilities is:
Typhoid Vi antigen type of vaccine is:
Which of the following statement is wrong about C\(_4\) plants
The cationic antimicrobial peptide, histatin is found in human's_____________.
Convalescent sera belongs to
The ability of a molecule to function as an antigen depends on its:
A. Size
B. Structural complexity
C. Chemical nature
D. Degree of foreign nature to the host
Choose the correct answer from the options given below:
The Ti plasmid and its T-DNA have been genetically modified for use as a vector for the insertion of recombinant DNA into plant chromosomes to prevent dicots from tumor diseases. The source of Ti plasmid is:
Match LIST-I with LIST-II
LIST-I (Immunoglobulin Class) LIST-II (Characteristics)
A. IgGI. Serves as part of B-cell receptor complex  
B. IgAII. Anaphylactic mediating antibody  
C. IgDIII. Most abundant in body fluid, neutralize toxins, opsonizes bacteria  
D. IgEIV. Secretory antibody and protect mucous membrane  
Choose the correct answer from the options given below:
A method for culturing anaerobes is the GasPak System, which uses hydrogen and a ___________ catalyst to remove O\(_2\).
The antimicrobial agent mercuric chloride functions by
Match LIST-I with LIST-II
Choose the correct answer from the options given below:
Organisms belongs to the genus bacteroides are:
Match LIST-I with LIST-II
LIST-I (Commercial Production) LIST-II (Microorganism)
A. Citric acidI. Corynebacterium glutamicum  
B. EthanolII. Aspergillus niger  
C. Amino acids and nucleotidesIII. Claviceps purpurea  
D. AlkaloidsIV. Saccharomyces cerevisiae  
Choose the correct answer from the options given below:
Tetracycline is usually mixed with the culturing medium as selective agents in selecting transformants in gene cloning technique. It acts by: