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Biology > Deck 21 (401 - 420) > Flashcards

Deck 21 (401 - 420) Flashcards

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1
Q
  1. Asteraceae do not include:

a. Taraxacum officinale
b. Bellis perennis
c. Lactuca sativa
d. Ocimum basilicum

A

Ocimum basilicum

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2
Q
  1. In cross of two dominant homozygotes in their progeny:

a. in the f2 generation, cleavage of phenotypes and genotypes occurs
b. phenotypically and genotypically identical individuals occur
c. the trait is manifested more expressively than with their parents
d. the members of the F1 generation are uniformly heterozygous

A

phenotypically and genotypically identical individuals occur

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3
Q
  1. Reptiles of the anapsid lineage gave rise to mammals. True or false?
A

false

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4
Q
  1. The following is/are the hormone of adenohypophysis regulating the function of the corpus luteum of man:

a. follicle-stimulating
b. lutenizing
c. progesterone
d. thyrotropin

A

b. lutenizing

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5
Q
  1. Which of the following plants are grown of oil seeds:

a. Elaeis guineensis
b. Phoenix dactylifera
c. Cocos nicifera
d. Areca catechu

A

a. Elaeis guineensis

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6
Q
  1. In complete dominance and cross of the homozygote with the heterozygote (AA x Aa):

a. in the progeny we find the phenotypic cleavage ratio of 1 : 1
b. in the progeny, cleavage of phenotypes occurs in the ratio 3 : 1
c. the progeny are genotypically uniform
d. one half of the progeny are heterozygous

A

one half of the progeny are are heterozygous

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7
Q
  1. Lysosomes contain

a. hydrolytic enzymes
b. genetic material
c. carbohydrates
d. DNA

A

a. hydrolytic enzymes

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8
Q
  1. The following is the hormone of adenohypophysis regulating the function of human ovarian follicles

a. prolactin
b. thyroxin
c. antidiuretic hormone
d. gonadotropic hormone

A

d. gonadotropic hormone

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9
Q
  1. Protein coat of viruses is called ?
A

capsid

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10
Q
  1. Phenotypic ratio of 1:1:1:1 holds true in:

a.the reciprocal cross of heterozygotes and complete dominance
b. cross of the dominant homozygote with the heterozygote and complete dominance
c. the back cross in dihybridism
d. extra-chromosomal inheritance

A

the back cross in dihybridism

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11
Q
  1. Thyrotropin of man is formed in:

a. in the thyroid gland
b. in adenohypophysis
c. in hypothalamus
d. in neurohypophysis

A

in adenohypophysis

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12
Q
  1. Some species of viruses have one of the following on the surface of the capsid:

a. peptidoglycan covering
b. fatty covering
c. plasmalemma
d. glycoprotein covering

A

b. fatty covering

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13
Q
  1. tRNA transfers:

a. specifically bound amino acids
b. information from the nucleus to ribosomes
c. nucleotides on ribosomes
d. an arbitrary amino acid

A

specifically bound amino acids

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14
Q
  1. Recessive homozygotę may occur from the cross of:

a. Aa x AA #0
b. Aa x Aa #1
c. AA x aa #0
d. AaBb x AABB #0

A

b. Aa x Aa #1

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15
Q
  1. Thyrotropin of man:

a. belongs to the glandotropic hormones
b. supports the growth and activity of parathyroid glands
c. is formed in the parathyroid glands at the decrease of thyroxin level
d. belongs to the gonadotropic hormones

A

a. belongs to the glandotropic hormones

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16
Q
  1. Viruses cannot multiply independently because:

a. they do not contain DNA or RNA
b. they do not have a division spindle
c. they are ectoparasites
d.they do not have their own metabolism

A

they do not have their own metabolism

17
Q
  1. The synthesis of enzymes is controlled:

a. genetically
b. by the active centre of the enzyme
c. hormonally
d. by active site of ribosome

A

genetically

18
Q
  1. Genotypic ratio in the progeny of two heterozygotes Aa x Aa in complete dominance is:

a. 1AA:2aa:1Aa, 25% of individuals have a recessive trait
b. 1:2:1
c. 1AA:2Aa:1aa, 50% of individuals have a recessive trait
d.1AA:2Aa:1aa, 50% of individuals have an intermediary trait

A

1:2:1

19
Q
  1. The following is synthesised in the hind lobe of hypophysis:

a. adrenocorticotropic hormone
b. calciferol
c. adrenalin
d. none of the above

A

d. none of the above

20
Q
  1. The causative agent of respiratory infections belongs to the genus:

a. Salmonella
b. Streptococcus
c. Shigella
d. Escherichia

A

Streptococcus

Biology (25 decks)

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