一、填空(共15分,每格0.5分) 1.微生物从三羧酸循环中的a和b分别合成谷氨酸和天门冬氨酸,而丙氨酸、缬氨酸和亮氨酸均是从c合成的

一、填空(共20分,每格0.5分) 1.革兰氏染色法是鉴别细菌的重要方法,染色的要点如下:先用染色,再加b处理,使菌体着色,然后用c脱色,最后用d复染,呈e为革兰氏阳性反应

一.是非题(共10分。只需注明“对”或“错”) 1.大多数嗜热菌的G-C含量高于中温菌。 2.大肠杆菌属低等原核生物,所以其遗传物质只是一条松散的环状双链DNA,不存在DNA高级结构

一.是非题(共10分。只需注明“对”或“错”) 1.自然界存在的个体最大的微生物属于真菌界。 2.大肠杆菌和枯草芽孢杆菌属于单细胞生物,唾链球菌和金黄色葡萄球菌属于多细胞生物

Section i Listening comprehension Directions: This section is designed to test your ability to understand spoken English. You will hear a selection of recorded materials and you must answer the questions that accompany them. There are three parts in this

Section I Listening Comprehension Directions: This section is designed to test your ability to understand spoken English. You will hear a selection of recorded materials and you must answer the questions that accompany them. There are three parts in this ection, Part A, Part B and Part C. Remember, while you are doing the test, you should first put down your answers in your test booklet. At the

Part I Structure and Vocabulary Section A on A Directions: Beneath each of the following sentences, there are four choices marked A, B, and D)Choose the one that best completes the sentence. Mark your answer on the ANSWER SHEET. (5 points)

Simulated Test [PREVIOUS] INEXT] Part Structure and Vocabulary Section A Directions: Beneath each of the following sentences, there are four choices marked A, B, C and D)Choose the one that best completes the sentence. Mark your answer on the ANSWER SHEET. (5 points

Simulated Test [PREVIOUS] [NEXT] Part I Structure and Vocabulary Section A Directions: Beneath each of the following sentences, there are choices marked A, B, C and)Choose the one that best completes the sentence. Mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets. (5 points)

Simulated Test [PREVIOUS] INEXT] Part I Structure and Vocabulary Section A Directions: Beneath each of the following sentences, there are 4 choices marked A, B, C and D)Choose the one that best completes the sentence. Mark your anawer on the ANSWER SHEET by blackening the corresponding letter in the brackets. (5 point)