Biotechnology Quiz | MCQ | Biotech Test Quiz 03 #mcq.CETJOB - Multiple choice questions and Objectives
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Biotechnology Quiz | MCQ | Biotech Test Quiz #mcq.CETJOB


1 >>A human female has ____ pairs of autosomes and the sex chromosome complement of ?
  • (A) 23, XX.
  • (B) 23, X.
  • (C) 22, XX.
  • (D) 22, XY.
2 >>Wearing contact lenses that change the color of the eyes changes the ?
  • (A) phenotype.
  • (B) genotype.
  • (C) both a and b.
  • (D) neither a nor b.
3 >>Which of the following is the genetic material? ?
  • (A) DNA
  • (B) RNA
  • (C) protein
  • (D) it has not been identified
4 >>Geneticist Hermann J. Muller wrote "In a sense we contain ourselves, wrapped up within ourselves, trillions of times repeated." To what does this quote refer? ?
  • (A) the cell
  • (B) the population
  • (C) the society
  • (D) the genome




5 >>The fundamental units of life are ?
  • (A) genes.
  • (B) alleles.
  • (C) chromosomes.
  • (D) cells.
6 >>Organelles called ____ provide energy from the products of digestion. ?
  • (A) endoplasmic reticulum
  • (B) mitochondria
  • (C) lysosomes
  • (D) Golgi bodies
7 >>Tay-Sachs disease results from the absence of a particular enzyme found in the ?
  • (A) endoplasmic reticulum.
  • (B) mitochondria.
  • (C) lysosomes.
  • (D) Golgi bodies.
8 >>A replicated chromosome consists of two very long strands of identical chromosomal material called ?
  • (A) telomeres.
  • (B) chromatids.
  • (C) centromeres.
  • (D) genes.
9 >>DNA synthesis occurs during the ____ phase of the cell cycle. ?
  • (A) gap 1 (G1)
  • (B) gap 2 (G2)
  • (C) S
  • (D) Mitosis
10 >>In ____, chromosomes align down the center of the cell, held by the spindle. ?
  • (A) prophase
  • (B) metaphase
  • (C) anaphase
  • (D) telophase
11 >>During ____, replicated chromosomes condense, the spindle forms, and the nuclear membrane breaks down. ?
  • (A) prophase
  • (B) metaphase
  • (C) anaphase
  • (D) telophase
12 >>In ____, centromeres part and one set of chromosomes is pulled to each end of the cell. ?
  • (A) prophase
  • (B) metaphase
  • (C) anaphase
  • (D) telophase
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13 >>Chromosome tips, or ____, function as a cellular clock that ticks down as pieces are lost from the very ends. ?
  • (A) chromatids
  • (B) centromeres
  • (C) centrioles
  • (D) telomeres
14 >>___ molecules assist cell movement. ?
  • (A) Signal transduction
  • (B) Prion
  • (C) Cellular adhesion
  • (D) Peroxisome
15 >>Which of the following pairs a genetic disorder with the incorrect defective macromolecule or essential nutrient? ?
  • (A) Lesch-Nyhan syndrome - nucleic acids
  • (B) maple syrup urine disease - vitamins
  • (C) familial hypercholesterolemia - lipids
  • (D) lactose intolerance - carbohydrate
16 >>Which inherited disease is caused by faulty ion channels? ?
  • (A) cystic fibrosis
  • (B) Lesch-Nyhan syndrome
  • (C) sickle cell anemia
  • (D) maple syrup urine disease
17 >>Prions are ?
  • (A) recently discovered organelles in bacteria.
  • (B) a single or double strand of nucleic acid wrapped in a protein coat.
  • (C) a naturally occurring glycoprotein that takes two forms.
  • (D) none of the above.
18 >>A child is taken to the doctor with the following symptoms: low blood sugar, darkened skin, muscle weakness, and heartbeat irregularities. The doctor concludes that the child has ALD and the symptoms arise from the accumulation of very-long-chain fatty acids in the cells of the brain and spinal cord. The malfunctioning enzyme is associated with the ?
  • (A) genes.
  • (B) alleles.
  • (C) chromosomes.
  • (D) cells.
19 >>Assume that a cell has 50 units of DNA at G1 of interphase. How many units of DNA would a cell at prophase of mitosis contain? ?
  • (A) 25
  • (B) 50
  • (C) 100
  • (D) 150


20 >>Which of the three recognized domains of life were previously considered together as prokaryotes? ?
  • (A) Archaea and Bacteria
  • (B) Eukarya and Bacteria
  • (C) Eukarya and Archaea
  • (D) prokaryotes are still separately recognized

 
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