What percentage of the total RNA in a cell is rRNA?
Correct answer D. 80%
Subject / 1,067 questions
MDCAT Biology MCQs
Page 31 of MDCAT Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 31 of 54
- Biological Molecules 74
- Coordination and Control 72
- Biology Diagnostic 70
- Cell Structure and Function 67
- Biotechnology 65
- Reproduction 58
- Bioenergetics 55
- Circulation 50
- Inheritance 48
- Digestion 45
- Immunity 45
- Support and Movement 45
- Acellular Life (Viruses) 45
- Homeostasis 45
- Respiration and Gaseous Exchange 45
- Evolution 45
- Enzymes 45
- Cell Cycle 41
- Chromosome and DNA 40
- Biology Introduction 38
- Ecosystem 27
In which cells will genes not be found in pairs?
Correct answer B. Sperm cells of frog
What is the chemical nature of most cellular secretions?
Correct answer D. Glycoproteins
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Which phase of the cell cycle comes immediately before mitosis?
Correct answer B. G2 phase
What is the correct sequence of the stages of prophase I of meiosis?
Correct answer B. Leptotene, zygotene, pachytene, diplotene, diakinesis
How do non-polar organic molecules behave in water?
Correct answer B. Insoluble
How many tetrads are formed during mitosis in humans?
Correct answer A. 0
What is the sequence of three bases on tRNA that pairs with a codon on mRNA called?
Correct answer C. Anticodon
Which of the following is a correct description of DNA transcription?
Correct answer D. It produces mRNA
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At which stage of development does a cavity first appear?
Correct answer D. Blastula
What is the basic structural unit of a chromosome?
Correct answer D. Nucleosome
What is the stimulation of flowering in plants by exposure to low temperatures called?
Correct answer B. Vernalisation
Which cells in the testes secrete testosterone?
Correct answer A. Interstitial cells
What type of learning involves a reduced or lost response to a repeated stimulus?
Correct answer B. Habituation
Sleep movements in plants are which type of movement?
Correct answer A. Turgor movements
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Which of the following is most likely to happen in an animal during winter?
Correct answer A. Thermogenesis
In mammals, what does sebum from sebaceous glands help with?
Correct answer B. Protection against microorganisms
In what state are animal fats at room temperature?
Correct answer C. Solids
What type of bond keeps the helical structure of proteins in place between amino acids?
Correct answer A. H bonds
How many nitrogenous base pairs are there in each turn of the DNA helix?
Correct answer D. 10