【GR1222】 The Solution for GRE Biochemistry Practice Test [01-20]

The Solution for GRE Biochemistry Practice Test [01-20]

 

추천글 : 【GRE】 Solution for GRE Biology Practice Test

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1. Which of the following is activated by phosphorylation?

 

 

⑴ answer: D

⑵ 신호전달, MAPK 

 

 

2. When yeast produce ethanol from glucose, the reaction of acetaldehyde to form ethanol directly

 

 

⑴ answer: C

⑵ 알코올 발효 : NADH를 NAD⁺으로 복원시켜 다시 NADH를 생성시키는 다시 해당과정을 진행할 수 있음 

 

 

3. Eukaryotic cells and their organelles are disrupted by sonication. A centrifuge is used to separate soluble and insoluble components. Protein X is found in the insoluble fraction following centrifugation. The insoluble fraction is treated with 0.5 M NaCl and centrifugation is repeated. Protein X is now found in the soluble fraction. Protein X would be best described as 

 

 

⑴ answer: C

⑵ 주변부 단백질은 세포막에 정전기적으로 부착하여 친수성과 소수성의 중간 

 

 

4. Which of the following macromolecules would yield only one type of monomer after complete hydrolysis?

 

 

⑴ answer: B

⑵ 글리코겐은 포도당으로만 구성돼 있음

⑶ 예를 들어, DNA는 4가지 염기 (+ 비표준 핵산)가 존재함

 

 

5. Which of the following processes is an example of post-translational modification of protein?

 

 

⑴ answer: B

⑵ PTM : 당화, 인산화, 이황화결합, 프레닐화, 유비퀴틴화, 아세틸화, 황화, 메틸화, 나이트로화, 아민화, 포르밀화, 팔미토일화, 히드록실화, SUMOylation, lipid anchoring 등

 

 

6. In which of the following locations might a protein that enters the lumen of the endoplasmic reticulum also be found?

 

 

⑴ answer: E

⑵ 소포체 내부가 막 외부와 위상이 같음 : 단백질 N 말단과 관련 있고, N 말단 근처에 신호서열이 있어 소포체 내부로 이동케 함

 

 

7. A unique property of lysosomal proteins is that they

 

 

⑴ answer: D

⑵ 리소좀 성숙 : 만노오스가 관여

 

 

8. The beadlike unit of chromatin structure is the 

 

 

⑴ answer: B

⑵ 뉴클레오좀 

 

 

9. Inactivation of one X chromosome in female mammals is an example of which of the following phenomena?

 

 

⑴ answer: A

⑵ 바소체 

 

 

10. Which of the following occurs during first meiotic prophase?

 

 

⑴ answer: D

⑵ 교차(crossover, chiasma) : 감수 제1분열 전기에 일어남 

 

 

11. Two AaBb individuals are crossed. What is the probability that a particular offspring will show one or both of the dominant traits? (A and B are dominant to a and b, repectively, and are unlinked.)

 

 

⑴ answer: E

⑵ 1 - (1/4) × (1/4) = 15/16 

 

 

12. In which of the following regions of a eukaryotic gene will a point mutation most likely have a major negative impact on the function of the encoded protein?

 

 

⑴ answer: E

⑵ 🄓의 경우 워블 가설에 의해 중립돌연변이가 될 수도 있음

 

 

13. The migration of a protein on an SDS polyacrylamide gel is best described as inversely proportional to the 

 

 

⑴ answer: D

⑵ 이동거리 = Δt × (a × log M + b), a < 0, M : molecular weight

 

 

14. The effectiveness of allosteric effectors in regulating metabolic pathways is based on their ability to

 

 

⑴ answer: A

⑵ 알로스테릭 조절   

 

 

15. Which of the following enzymes in the anabolic pathway represented below is most likely to catalyze the rate-limiting step in the biosynthesis of A₆?

 

 

⑴ answer: C

⑵ 생화학 반응에서는 속도결정단계의 조절에 따라 반응이 다른 방향으로 분기되는 일이 흔함

⑶ 예 : 해당과정 

 

 

16. Ribulose 1,5-bisphosphate carboxylase, which catalyzes the fixation of carbon dioxide during photosynthesis in plants and many algae, is located in which of the following cellular compartments?

 

 

⑴ answer: B

⑵ 엽록체 

 

 

17. The phospholipids of plasma membranes routinely exhibit which of the following forms of movement?

 

 

⑴ answer: D

⑵ Ⅱ는 apoptosis 상황 

 

 

18. Of the following, the best evidence that the interaction between a protein and a nucleic acid in a particular complex is hydrophobic is if the complex is dissociated by 

 

 

⑴ answer: B

 

 

19. Excitation in the postsynaptic membrane is caused by which of the following?

 

 

⑴ answer: A

 

 

20. Mutation of DNA within a single somatic cell of a multicellular organism

 

 

⑴ answer: A

 

입력: 2026.04.06 01:51