【GR1724】 The Solution for GRE Biology Practice Test [120-140]

The Solution for GRE Biology Practice Test [120-140]

 

추천글 : 【GRE】 Solution for GRE Biology Practice Test 

---

 

Questions 120-122 refer to the following.

 

 

120. Has relatively little biological activity

⑴ answer: B

⑵ prohormone

 

 

121. Binds to adenylate cyclase 

⑴ answer: E

⑵ GPCR(G protein-coupled receptor)

 

 

122. Readily traverses cell membranes

⑴ answer: D

⑵ steroid hormone 

 

 

Questions 123-125 refer to the following components of the lac operon in bacteria.

 

 

123. Is bound by repressor protein

⑴ answer: B

⑵ lac operon

 

Figure. 1. the structure of the lac operon

 

 

124. Contains binding site for RNA polymerase 

⑴ answer: C

 

 

125. Encodes reprossor protein 

⑴ answer: E

 

 

Questions 126-129 refer to the following graph.

 

 

126. Rate of population growth is highest.

⑴ answer: C

⑵ batch culture : lag phase (A, B) → exponential phase (B, C) → deceleration phase (D) → stationary phase (E) → death

 

 

127. Per capita growth rate is highest.

⑴ answer: A 

⑵ The lag phase is to increase in cell volumes and preparation for the next replications.

 

 

128. Both population and per capita growth rates are positive but decelerating.

⑴ answer: D

 

 

129. Population size is nearest to carrying capacity.

⑴ answer: E

⑵ The population size reaches the saturation point in E.

 

 

Questions 130-132 refer to the following.

 

 

130. Bipolar-filament-forming protein that binds and hydrolyzes GTP

⑴ answer: B

⑵ cytoskeleton : Actin uses ATP and Tubulin uses GTP.

 

 

131. Major cytoskeletal protein in microvilli, filopodia, contractile rings, and  growth cones

⑴ answer: A

 

 

132. Calcium-binding switch protein in vertebrate skeletal muscle fibers

⑴ answer: E

⑵ Calcium-troponin complex and its involvement in the sliding filament model.

 

 

Questions 133-136 refer to the following functions.

 

 

133. Radula of molluscs

⑴ answer: D

 

 

134. Spicules of sponges

⑴ answer: B

 

 

135. Nematocysts of cnidarians

⑴ answer: D

 

 

136. Tracheae of insects

⑴ answer: A

 

 

Questions 137-140 refer to the following.

 

 

137. A group of potentially interbreeding individuals present at the same location

⑴ answer: E

⑵ ecological scale : individual → population → community → ecosystem (e.g., biome)

⑶ metapopulation : a group of spatially separated populations of the same species which interact at some level.

 

 

138. A group of potentially interacting species present at the same location

⑴ answer: B

 

 

139. A large geographical area characterized by its dominant form of vegetation

⑴ answer: A

 

 

140. All organisms and their nonliving environment present at the same location

⑴ answer: C

 

 

입력: 2023.05.21 13:13