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? ?
