Biology Practice Test 7

Q. 1
A defective segment of DNA that resembles a gene but cannot produce functional protein is called
  • a. Exon
  • b. Pseudogenes
  • c. Regulatory sequence
  • d. Homeotic gene
  • e. Lethal gene
  • Answer: A

Q. 2
The process by which immature cells develop into matured cells of a specific lineage is
  • a. Organogenesis
  • b. Differentiation
  • c. Growth
  • d. Pattern formation
  • e. Morphogenesis
  • Answer: A

Q. 3
In humans, the part of the large intestine that opens into rectum is called
  • a. Caecum
  • b. Colon
  • c. Ileum
  • d. Anus
  • e. Jejunum
  • Answer: A

Q. 4
Which of the following occurs as a result of accumulation of fertilizers in a pond?
  • a. Biodegradation
  • b. Biomagnification
  • c. Bioaccumulation
  • d. Eutrophication
  • e. Spontaneous combustion
  • Answer: A

Q. 5
In humans, an extra X chromosome causes
  • a. Klinefelter syndrome
  • b. Down syndrome
  • c. Hemophilia
  • d. Porphyria
  • e. Autism
  • Answer: A

Q. 6
The rumen of cattle contains _________
  • a. Methanobacterium
  • b. Acetobacterium
  • c. Corynebacterium
  • d. Halobacterium
  • e. Mycobacterium
  • Answer: A

Q. 7
Altruism is
  • a. A behaviour by an animal that benefits other members of its species
  • b. A behaviour by an animal that troubles other members of its species
  • c. A behaviour by an animal that troubles members of other species
  • d. A behaviour by an animal that hides food from its fellow beings
  • e. None of the above
  • Answer: A

Q. 8
The state in which viral genome gets integrated with the host genome is
  • a. Provirus
  • b. Absorption
  • c. Prophase
  • d. Lytic cycle
  • e. None of these
  • Answer: A

Q. 9
Breakdown of fat into fatty acid and glycerol is
  • a. Anabolism
  • b. Catabolism
  • c. ??- oxidation
  • d. ??- oxidation
  • e. Both A and C
  • Answer: A

Q. 10
Duplication of chromosomes takes place in
  • a. S phase
  • b. G1 phase
  • c. G2 phase
  • d. Prophase
  • e. Anaphase
  • Answer: A

Q. 11
The enzyme involved in the synthesis of mRNA is
  • a. RNA polymerase I
  • b. RNA polymerase II
  • c. RNA polymerase III
  • d. Ribonuclease
  • e. Hexokinase
  • Answer: A

Q. 12
Cleptobiosis is an ecological relationship that can be seen in
  • a. Ants
  • b. Cockroaches
  • c. Tiger
  • d. Deer
  • e. None of the above
  • Answer: A

Q. 13
Which cell organelle has a role in transporting materials to other parts of a cell?
  • a. Golgi complex
  • b. Lysosome
  • c. Chloroplast
  • d. Mitochondria
  • e. Nucleus
  • Answer: A

Q. 14
In an ecosystem, keystone species are those
  • a. Contributing to ecosystem properties
  • b. That are most frequent
  • c. Present in minimum number
  • d. Attaining large biomass
  • e. Having high competency
  • Answer: A

Q. 15
The role of cardinal genes in Drosophila is
  • a. Pattern formation
  • b. Sex determination
  • c. Metamorphosis
  • d. Cephalic furrow formation
  • e. Germ band extension
  • Answer: A

Score: 0/15