問題詳情
19. MPF (maturation-promoting factor) turns itself off by
(A) activating an enzyme that dissociates cyclin from cyclin-dependent kinase (Cdk).
(B) activating an enzyme that phosphorylates cyclin.
(C) activating an enzyme that phosphorylates Cdk.
(D) activating an enzyme that destroys cyclin.
(E) activating an enzyme that destroys Cdk.
(A) activating an enzyme that dissociates cyclin from cyclin-dependent kinase (Cdk).
(B) activating an enzyme that phosphorylates cyclin.
(C) activating an enzyme that phosphorylates Cdk.
(D) activating an enzyme that destroys cyclin.
(E) activating an enzyme that destroys Cdk.
參考答案
無參考答案
內容推薦
- Which of the following terms did E. O. Wilson use to describe our innate appreciation of wild en
- Which of the following statements about primary productivity is correct?(A) The highest primary
- Which of the following statements is true?(A) The Hardy-Weinberg law applies to small, unstable
- Which of the following is not true about micronutrients in plants?(A) They generally help in cat
- Which of the following statements is correct?(A) Speciation occurs when mutations generate obser
- Which of the following is descriptive of protosomes?(A) spiral and indeterminate cleavage, schiz
- The shaping of an animal and its individual parts into a body form with specialized organs and ti
- Catastrophism was Cuvier's attempt to explain(A) natural selection. (B) uniformitarianism. (
- If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will(A) move directly int
- As a group, acoelomates are characterized by(A) deuterostome development.(B) the absence of a bra
內容推薦
- Consider a field plot containing 200 kg of plant material. How many kg of carnivore production c
- A person suffering from AIDS would be unlikely to suffer from which of the following diseases?(A
- The vascular system of a three-year-old dicot stem consists of(A) 3 rings of xylem and 3 of phlo
- Within the female gametophyte, three mitotic divisions of the megaspore produce(A) the triple fu
- Which of the following is correctly paired?(A) forebrain – diencephalons (B) midbrain – cerebell
- A pathogenic fungus invades a plant. Which of the following does the plant produce in response t
- The most common pattern of dispersion in nature is(A) random. (B) uniform. (C) indeterminate. (D
- Which of the following statements is false?(A) Estuaries support many semiaquatic species.(B) Ma
- Which of the following is true in the logistic model of population growth?(A) as N approaches K,
- Which of the following does not have a coefficient of relatedness of 0.5 in humans?(A) a brother
- The population cycle of the snowshoe hare and its predator indicates that(A) predators are not t
- 圖四為三國鼎立形勢圖，請問：以下何者正確？(A)三國立國的先後順序為甲→乙→丙(B)三國鼎立的局面和赤壁之戰有關(C)三國亡國的先後順序為乙→丙→甲(D)司馬睿結束了三國以來的分裂局面。
- Which of the following statements about endocrine system is false?(A) Hormones from the adrenal
- The endoplasmic reticulum and Golgi apparatus are very similar among the groups of alga-like pro
- A gastrovascular cavity, with a single opening, is the characteristic digestive system of animal
- If two modern organisms are distantly related in an evolutionary sense, then one should expect t
- How do cleavage divisions differ from normal mitotic cell divisions?(A) Cleavage divisions occur
- Cephalization is generally associated with all of the following except(A) bilateral symmetry. (B
- According to the wobble rules, a tRNA with the anticodon 5'-GAU-3' can recognize the c
- In the presence of an antibiotic prokaryotic translation can initiate, but only dipeptides that
- 有關自來水事業之經營方式，下列何者正確？(A)以公營為原則，並得准許民營 (B)以公營為原則，不得准許民營(C)以民營為原則，並得准許公營 (D)以公辦民營為原則
- In a sinusoidal-ac circuit, the current is I=I0sin(ωt +θ) . What is the rms(root-mean-square) cur
- The following organism with the greatest number of Hox genes should be a(n)(A) fish. (B) fly. (C
- A long solenoid of 500 turns carrying a current of 8 A produces within itself a uniform magneti
- A sample of 770 mol of nitrogen gas is maintained at a constant pressure of 00 atm in a flexibl