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Home » Medical Papers » UHS MDCAT » Aptitude Test - 59
1. Restriction endonucleases cleave the __________ of duplex DNA.
A. Nitrogenous base
B. Base sugar
C. Phosphodiester bond
D. Nitrogenous base
2. The enzyme which is responsible for the formation of bond between two double stranded DNA fragments is:
A. Endonuclease
B. Urease
C. Ligase
D. Endonuclease
3.The organisms of third trophic level are:
A. Primary consumer
B. Primary producer
C. Tertiary consumer
D. Primary consumer
4.The ultimate source of energy in an ecosystem is:
A. Photosynthesis
B. Sun
C. Plants
D. Photosynthesis
5.All the food chains and food webs begin with:
A. Detritus
B. Herbivores
C. Green plants
D. Detritus
6.The change from bare rock or open area is rapid, especially in the initial stages and follows a series of recognizable and hence predictable stages. This process is called:
A. Pioneers
B. Xerosere
C. Succession
D. Pioneers
7.Locusstands for:
A. Position of gene on homologous chromosome
B. Regions of chromosomes
C. Position of an allele with in a DNA molecule
D. Position of gene on homologous chromosome
8.The decline in the thickness of ozone layer is caused by:
A. Increasing level of nitrogen oxide
B. Decreasing level of O2
C. Decreasing level of CFCs
D. Increasing level of nitrogen oxide
9.Which one of the following is considered as strong evidence of evolution?
A. Embryology Record
B. Molecular Record
C. Biochemical Record
D. Embryology Record
10.Self fertilization of F-1 dihybrids,following independent assortment of alleles result in:;
A. 3/16Tall-round;3/16dwarf-wrinkled
B. 9/16Tall-wrinkled;3/16dwarf-round
C. 9/16Tall-round;3/16Dwarf-round
D. 3/16Tall-round;3/16dwarf-wrinkled
11.Structures found in different species which are believed to have a common evolutionary origin are called:
A. Homologous
B. Analogous
C. Vestigial
D. Homologous
12.Which one of the following is X-linked trait?
A. Male pattern baldness
B. Diabetes mellitus
C. Human eye colour
D. Male pattern baldness
13.Which one of the following is X-linked trait?
A. Male pattern baldness
B. Diabetes mellitus
C. Human eye colour
D. Male pattern baldness
14.As a result of cross-fertilization of a true breeding pea plant having purple coloured flowers; with that of white coloured flowers,the off springs will have flowers with:
A. 1/4purple;3/4white
B. 1/4white;3/4purple
C. All white
D. 1/4purple;3/4white
15. A character determined by three alleles is:
A. Human skin colour
B. Human blood group
C. Human eye colour
D. Human skin colour
16.The gene for red-green colour blindness is present on:
A. Y-chromosome
B. X-chromosome
C. Autosome 7
D. Y-chromosome
17.________ is the branch of Biology used for the identification and interpretation of fossils.
A. Evolution
B. Paleontology
C. Zoogeography
D. Evolution
18.Out of the given options, choose the one which shows the structures found only in plants
A. Vacuole, Chloroplast, Ribosomes
B. Chloroplast, Microtubules, Peroxisomes
C. Chloroplast, Cell Wall, Vacuole
D. Vacuole, Chloroplast, Ribosomes
19.W.O.F structures is present in both plant and animal cells but is absent in prokaryotic cells:;
A. Centrioles;
B. Microtubule;
C. Plastids
D. Centrioles;
20.Presence of large central vacuole is the characteristic o
A. Prokaryotes
B. Protists
C. Fungi
D. Prokaryotes
21.Cilia and flagella are absent in:
A. Viruses
B. ,Bacteria
C. Higher plants
D. Viruses
22.The basic structure of plasma membrane is provided by:
A. Proteins
B. Cholesterols
C. Cytoskeleton
D. Proteins
23.The basic structure of plasma membrane is provided by:
A. Proteins
B. Cholesterols
C. Cytoskeleton
D. Proteins
24.Down’s syndrome is characterized by _____________ at chromosome 21.
A. Trisomy
B. Monosomy
C. Polysomy
D. Trisomy
25.DNA molecule in prokaryotes is:
A. Single,circular,double stranded molecule not bound by membrane
B. Double,circular molecule
C. Linear double stranded molecule
D. Single,circular,double stranded molecule not bound by membrane
26.Which of the following is an example of autosomal non-disjunction?
A. Turner’s Syndrome
B. Jacob’s Syndrome
C. Metastasis
D. Turner’s Syndrome
27.Nucleoid is a structure not found in:
A. Campylobacter
B. Cyanobacteria
C. Spirochete
D. Campylobacter
28. Infertility, short height, webbed neck and low hairline at lack are symptoms of _____________ syndrome.
A. Turner’s
B. Down’s
C. Edward’s
D. Turner’s
29.Ribosomes present in prokaryotes are:
A. 80S
B. 60S
C. 50S
D. 80S
30.The concentration of sodium ions in body fluids is controlled by the hormone:
A. Renin
B. Aldosterone
C. Angiotensin
D. Renin
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