理科综合试卷(一)(国外英文资料).docVIP

理科综合试卷(一)(国外英文资料) Collected by oneself Mistakes are unavoidable For reference only In case of error Please correct me! Thanks Science comprehensive test paper (1) This volume is divided into two parts, namely, volume I (multiple-choice question) and volume II (non choice question) 300 points! The exam time is 150 minutes Volume 1 (150 total of multiple-choice questions) There are 30 questions in this volume 5 points for each question A total of 150 points. In the following four questions There is only one option that meets the requirements of the topic 1. in the following statement on the concept of amino acids The correct thing is that... [] A. amino acid is a unit of protein molecules Composed of amino groups and carboxyl groups B. each amino acid molecule contains an amino group and a carboxyl group C. the condensation of amino acids and carboxyl groups between two amino acid molecules to form polypeptides D. consists of at least one amino group and one carboxyl group in an amino acid molecule that makes up biological proteins And connected to the same carbon atom 2. when left ventricular ejection occurs The opening and closing of the heart valve and the direction of blood flow should be [] A. atrioventricular valve closure Aortic valve opening Blood flows from the ventricles to the aorta B. atrioventricular valve open Aortic valve opening Blood flows from the ventricle to the atrium C. atrioventricular valve closure Aortic valve opening The blood flows from the atria to the aorta D. atrioventricular valve open Aortic valve opening Blood flows from the ventricles to the aorta 3. the straight hairs (B) of certain mammals are dominant in curly hairs (b) Black (C) is dominant in white (c) (the two pairs of genes are on separate homologous chromosomes). Genotype BbCc individuals mate with X Representatives of the genus have: straight hair, black, curly hair, black, straight hair, white and curly white The ratio between them is 3 to 3: 1. to 1, and the individual X is